IF 13.1 1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-10-13 DOI: 10.1016/j.jechem.2023.09.044

Wenmiao Zhao , Xiaoyuan Shi , Bo Liu , Hiroshi Ueno , Ting Deng , Weitao Zheng

{"title":"The design and engineering strategies of metal tellurides for advanced metal-ion batteries","authors":"Wenmiao Zhao , Xiaoyuan Shi , Bo Liu , Hiroshi Ueno , Ting Deng , Weitao Zheng","doi":"10.1016/j.jechem.2023.09.044","DOIUrl":"10.1016/j.jechem.2023.09.044","url":null,"abstract":"<div>Owning various crystal structures and high theoretical capacity, metal tellurides are emerging as promising electrode materials for high-performance metal-ion batteries (MBs). Since metal telluride-based MBs are quite new, fundamental issues raise regarding the energy storage mechanism and other aspects affecting electrochemical performance. Severe volume expansion, low intrinsic conductivity and slow ion diffusion kinetics jeopardize the performance of metal tellurides, so that rational design and engineering are crucial to circumvent these disadvantages. Herein, this review provides an in-depth discussion of recent investigations and progresses of metal tellurides, beginning with a critical discussion on the energy storage mechanisms of metal tellurides in various MBs. In the following, recent design and engineering strategies of metal tellurides, including morphology engineering, compositing, defect engineering and heterostructure construction, for high-performance MBs are summarized. The primary focus is to present a comprehensive understanding of the structural evolution based on the mechanism and corresponding effects of dimension control, composition, electron configuration and structural complexity on the electrochemical performance. In closing, outlooks and prospects for future development of metal tellurides are proposed. This work also highlights the promising directions of design and engineering strategies of metal tellurides with high performance and low cost.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 579-598"},"PeriodicalIF":13.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135761230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

VSe2/V2C heterocatalyst with built-in electric field for efficient lithium-sulfur batteries: Remedies polysulfide shuttle and conversion kinetics 用于高效锂硫电池的内置电场的VSe2/V2C异催化剂:补救多硫化物穿梭和转化动力学

IF 13.1 1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-10-13 DOI: 10.1016/j.jechem.2023.10.003

Yanwei Lv, Lina Bai, Qi Jin, Siyu Deng, Xinzhi Ma, Fengfeng Han, Juan Wang, Lirong Zhang, Lili Wu, Xitian Zhang

{"title":"VSe2/V2C heterocatalyst with built-in electric field for efficient lithium-sulfur batteries: Remedies polysulfide shuttle and conversion kinetics","authors":"Yanwei Lv, Lina Bai, Qi Jin, Siyu Deng, Xinzhi Ma, Fengfeng Han, Juan Wang, Lirong Zhang, Lili Wu, Xitian Zhang","doi":"10.1016/j.jechem.2023.10.003","DOIUrl":"10.1016/j.jechem.2023.10.003","url":null,"abstract":"<div>Lithium sulfur (Li-S) battery is a kind of burgeoning energy storage system with high energy density. However, the electrolyte-soluble intermediate lithium polysulfides (LiPSs) undergo notorious shuttle effect, which seriously hinders the commercialization of Li-S batteries. Herein, a unique VSe2/V2C heterostructure with local built-in electric field was rationally engineered from V2C parent via a facile thermal selenization process. It exquisitely synergizes the strong affinity of V2C with the effective electrocatalytic activity of VSe2. More importantly, the local built-in electric field at the heterointerface can sufficiently promote the electron/ion transport ability and eventually boost the conversion kinetics of sulfur species. The Li-S battery equipped with VSe2/V2C-CNTs-PP separator achieved an outstanding initial specific capacity of 1439.1 mA h g−1 with a high capacity retention of 73% after 100 cycles at 0.1 C. More impressively, a wonderful capacity of 571.6 mA h g−1 was effectively maintained after 600 cycles at 2 C with a capacity decay rate of 0.07%. Even under a sulfur loading of 4.8 mg cm−2, areal capacity still can be up to 5.6 mA h cm−2. In-situ Raman tests explicitly illustrate the effectiveness of VSe2/V2C-CNTs modifier in restricting LiPSs shuttle. Combined with density functional theory calculations, the underlying mechanism of VSe2/V2C heterostructure for remedying LiPSs shuttling and conversion kinetics was deciphered. The strategy of constructing VSe2/V2C heterocatalyst in this work proposes a universal protocol to design metal selenide-based separator modifier for Li-S battery. Besides, it opens an efficient avenue for the separator engineering of Li-S batteries.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 397-409"},"PeriodicalIF":13.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135761229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stabilizing iridium sites via interface and reconstruction regulations for water oxidation in alkaline and acidic media 在碱性和酸性介质中通过界面稳定铱位点和水氧化的重建规则

IF 13.1 1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-11-10 DOI: 10.1016/j.jechem.2023.10.055

Weibin Chen , Yanhui Song , Lei Li , Junjie Guo , Zhan Lin

{"title":"Stabilizing iridium sites via interface and reconstruction regulations for water oxidation in alkaline and acidic media","authors":"Weibin Chen , Yanhui Song , Lei Li , Junjie Guo , Zhan Lin","doi":"10.1016/j.jechem.2023.10.055","DOIUrl":"10.1016/j.jechem.2023.10.055","url":null,"abstract":"<div>Exploring effective iridium (Ir)-based electrocatalysts with stable iridium centers is highly desirable for oxygen evolution reaction (OER). Herein, we regulated the incorporation manner of Ir in Co3O4 support to stabilize the Ir sites for effective OER. When anchored on the surface of Co3O4 in the form of Ir(OH)6 species, the created Ir-OH-Co interface leads to a limited stability and poor acidic OER due to Ir leaching. When doped into Co3O4 lattice, the analyses of X-ray absorption spectroscopy, in-situ Raman, and OER measurements show that the partially replacement of Co in Co3O4 by Ir atoms inclines to cause strong electronic effect and activate lattice oxygen in the presence of Ir-O-Co interface, and simultaneously master the reconstruction effect to mitigate Ir dissolution, realizing the improved OER activity and stability in alkaline and acidic environments. As a result, Irlat@Co3O4 with Ir loading of 3.67 wt% requires 294 ± 4 mV / 285 ± 3 mV and 326 ± 2 mV to deliver 10 mA cm−2 in alkaline (0.1 M KOH / 1.0 M KOH) and acidic (0.5 M H2SO4) solution, respectively, with good stability.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 355-363"},"PeriodicalIF":13.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135565716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insights into ionic association boosting water oxidation activity and dynamic stability 离子结合促进水氧化活性和动态稳定性的见解

1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-11-03 DOI: 10.1016/j.jechem.2023.10.036

Zanling Huang , Shuqi Zhu , Yuan Duan , Chaoran Pi , Xuming Zhang , Abebe Reda Woldu , Jing-Xin Jian , Paul K. Chu , Qing-Xiao Tong , Liangsheng Hu , Xiangdong Yao

{"title":"Insights into ionic association boosting water oxidation activity and dynamic stability","authors":"Zanling Huang , Shuqi Zhu , Yuan Duan , Chaoran Pi , Xuming Zhang , Abebe Reda Woldu , Jing-Xin Jian , Paul K. Chu , Qing-Xiao Tong , Liangsheng Hu , Xiangdong Yao","doi":"10.1016/j.jechem.2023.10.036","DOIUrl":"10.1016/j.jechem.2023.10.036","url":null,"abstract":"<div>There have been reports about Fe ions boosting oxygen evolution reaction (OER) activity of Ni-based catalysts in alkaline conditions, while the origin and reason for the enhancement remains elusive. Herein, we attempt to identify the activity improvement and discover that Ni sites act as a host to attract Fe(III) to form Fe(Ni)(III) binary centres, which serve as the dynamic sites to promote OER activity and stability by cyclical formation of intermediates (Fe(III) → Fe(Ni)(III) → Fe(Ni)–OH → Fe(Ni)–O → Fe(Ni)OOH → Fe(III)) at the electrode/electrolyte interface to emit O2. Additionally, some ions (Co(II), Ni(II), and Cr(III)) can also be the active sites to catalyze the OER process on a variety of electrodes. The Fe(III)-catalyzed overall water-splitting electrolyzer comprising bare Ni foam as the anode and Pt/Ni-Mo as the cathode demonstrates robust stability for 1600 h at 1000 mA cm−2@∼1.75 V. The results provide insights into the ion-catalyzed effects boosting OER performance.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 99-109"},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135411316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sulfur doped iron-nitrogen-hard carbon nanosheets as efficient and robust noble metal-free catalysts for oxygen reduction reaction in PEMFC 硫掺杂铁氮硬碳纳米片作为PEMFC中高效、稳健的无贵金属氧还原反应催化剂

IF 13.1 1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-11-15 DOI: 10.1016/j.jechem.2023.10.046

Bin Liu, Jiawang Li, Bowen Yan, Qi Wei, Xingyu Wen, Huarui Xie, Huan He, Pei Kang Shen, Zhi Qun Tian

{"title":"Sulfur doped iron-nitrogen-hard carbon nanosheets as efficient and robust noble metal-free catalysts for oxygen reduction reaction in PEMFC","authors":"Bin Liu, Jiawang Li, Bowen Yan, Qi Wei, Xingyu Wen, Huarui Xie, Huan He, Pei Kang Shen, Zhi Qun Tian","doi":"10.1016/j.jechem.2023.10.046","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.10.046","url":null,"abstract":"<div>Transition metal-nitrogen-carbon (M-N-C) as a promising substitute for the conventional noble metal-based catalyst still suffers from low activity and durability for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). To tackle the issue, herein, a new type of sulfur-doped iron-nitrogen-hard carbon (S-Fe-N-HC) nanosheets with high activity and durability in acid media were developed by using a newly synthesized precursor of amide-based polymer with Fe ions based on copolymerizing two monomers of 2, 5-thiophene dicarboxylic acid (TDA) as S source and 1, 8-diaminonaphthalene (DAN) as N source via an amination reaction. The as-synthesized S-Fe-N-HC features highly dispersed atomic FeNx moieties embedded into rich thiophene-S doped hard carbon nanosheets filled with highly twisted graphite-like microcrystals, which is distinguished from the majority of M-N-C with soft or graphitic carbon structures. These unique characteristics endow S-Fe-N-HC with high ORR activity and outstanding durability in 0.5 M H2SO4. Its initial half-wave potential is 0.80 V and the corresponding loss is only 21 mV after 30,000 cycles. Meanwhile, its practical PEMFC performance is a maximum power output of 628.0 mW cm−2 and a slight power density loss is 83.0 mW cm−2 after 200-cycle practical operation. Additionally, theoretical calculation shows that the activity of FeNx moieties on ORR can be further enhanced by sulfur doping at meta-site near FeN4C. These results evidently demonstrate that the dual effect of hard carbon substrate and S doping derived from the precursor platform of amid-polymers can effectively enhance the activity and durability of Fe-N-C catalysts, providing a new guidance for developing advanced M-N-C catalysts for ORR.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 422-433"},"PeriodicalIF":13.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138448667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An intrinsically self-healing and anti-freezing molecular chains induced polyacrylamide-based hydrogel electrolytes for zinc manganese dioxide batteries 一种具有自愈性和抗冻性的分子链诱导的基于聚丙烯酰胺的水凝胶电解质

IF 13.1 1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-10-24 DOI: 10.1016/j.jechem.2023.10.017

Haiyang Liao , Wenzhao Zhong , Chen Li , Jieling Han , Xiao Sun , Xinhui Xia , Ting Li , Abolhassan Noori , Mir F. Mousavi , Xin Liu , Yongqi Zhang

{"title":"An intrinsically self-healing and anti-freezing molecular chains induced polyacrylamide-based hydrogel electrolytes for zinc manganese dioxide batteries","authors":"Haiyang Liao , Wenzhao Zhong , Chen Li , Jieling Han , Xiao Sun , Xinhui Xia , Ting Li , Abolhassan Noori , Mir F. Mousavi , Xin Liu , Yongqi Zhang","doi":"10.1016/j.jechem.2023.10.017","DOIUrl":"10.1016/j.jechem.2023.10.017","url":null,"abstract":"<div>The anti-freezing strategy of hydrogels and their self-healing structure are often contradictory, it is vital to break through the molecular structure to design and construct hydrogels with intrinsic anti-freezing/self-healing for meeting the rapid development of flexible and wearable devices in diverse service conditions. Herein, we design a new hydrogel electrolyte (AF/SH-Hydrogel) with intrinsic anti-freezing/self-healing capabilities by introducing ethylene glycol molecules, dynamic chemical bonding (disulfide bond), and supramolecular interaction (multi-hydrogen bond) into the polyacrylamide molecular chain. Thanks to the exceptional freeze resistance (84% capacity retention at −20 °C) and intrinsic self-healing capabilities (95% capacity retention after 5 cutting/self-healing cycles), the obtained AF/SH-Hydrogel makes the zinc||manganese dioxide cell an economically feasible battery for the state-of-the-art applications. The Zn||AF/SH-Hydrogel||MnO2 device offers a near-theoretical specific capacity of 285 mA h g−1 at 0.1 A g−1 (Coulombic efficiency ≈100%), as well as good self-healing capability and mechanical flexibility in an ice bath. This work provides insight that can be utilized to develop multifunctional hydrogel electrolytes for application in next generation of self-healable and freeze-resistance smart aqueous energy storage devices.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 565-578"},"PeriodicalIF":13.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136092637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bifunctional TiO2−x nanofibers enhanced gel polymer electrolyte for high performance lithium metal batteries 双功能TiO2 -纳米纤维增强凝胶聚合物电解质用于高性能锂金属电池

IF 13.1 1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-10-20 DOI: 10.1016/j.jechem.2023.09.049

Yixin Wu, Zhen Chen, Yang Wang, Yu Li, Chunxing Zhang, Yihui Zhu, Ziyu Yue, Xin Liu, Minghua Chen

{"title":"Bifunctional TiO2−x nanofibers enhanced gel polymer electrolyte for high performance lithium metal batteries","authors":"Yixin Wu, Zhen Chen, Yang Wang, Yu Li, Chunxing Zhang, Yihui Zhu, Ziyu Yue, Xin Liu, Minghua Chen","doi":"10.1016/j.jechem.2023.09.049","DOIUrl":"10.1016/j.jechem.2023.09.049","url":null,"abstract":"<div>Exploration of advanced gel polymer electrolytes (GPEs) represents a viable strategy for mitigating dendritic lithium (Li) growth, which is crucial in ensuring the safe operation of high energy density Li metal batteries (LMBs). Despite this, the application of GPEs is still hindered by inadequate ionic conductivity, low Li+ transference number, and subpar physicochemical properties. Herein, TiO2−x nanofibers (NF) with oxygen vacancy defects were synthesized by a one-step process as inorganic fillers to enhance the thermal/mechanical/ionic-transportation performances of composite GPEs. Various characterizations and theoretical calculations reveal that the oxygen vacancies on the surface of TiO2−x NF accelerate the dissociation of LiPF6, promote the rapid transfer of free Li+, and influence the formation of LiF-enriched solid electrolyte interphase. Consequently, the composite GPEs demonstrate enhanced ionic conductivity (1.90 mS cm−1 at room temperature), higher lithium-ion transference number (0.70), wider electrochemical stability window (5.50 V), superior mechanical strength, excellent thermal stability (210 °C), and improved compatibility with lithium, resulting in superior cycling stability and rate performance in both Li||Li, Li||LiFePO4, and Li||LiNi0.8Co0.1Mn0.1O2 cells. Overall, the synergistic influence of nanofiber morphology and enriched oxygen vacancy structure of fillers on electrochemical properties of composite GPEs is comprehensively investigated, thus, it is anticipated to shed new light on designing high-performance GPEs LMBs.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 437-448"},"PeriodicalIF":13.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2095495623005764/pdfft?md5=d3e0e91f5cdc1931350e1f2d51bc7053&pid=1-s2.0-S2095495623005764-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136008034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-doping collaboratively controlling back interface and bulk defects to achieve efficient flexible CZTSSe solar cells 内掺杂协同控制后界面和本体缺陷，实现高效柔性CZTSSe太阳能电池

1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-11-03 DOI: 10.1016/j.jechem.2023.10.034

Quanzhen Sun , Yifan Li , Caixia Zhang , Shunli Du , Weihao Xie , Jionghua Wu , Qiao Zheng , Hui Deng , Shuying Cheng

{"title":"In-doping collaboratively controlling back interface and bulk defects to achieve efficient flexible CZTSSe solar cells","authors":"Quanzhen Sun , Yifan Li , Caixia Zhang , Shunli Du , Weihao Xie , Jionghua Wu , Qiao Zheng , Hui Deng , Shuying Cheng","doi":"10.1016/j.jechem.2023.10.034","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.10.034","url":null,"abstract":"<div>Focusing on the low open circuit voltage (VOC) and fill factor (FF) in flexible Cu2ZnSn(S,Se)4 (CZTSSe) solar cells, indium (In) ions are introduced into the CZTSSe absorbers near Mo foils to modify the back interface and passivate deep level defects in CZTSSe bulk concurrently for improving the performance of flexible device. The results show that In doping effectively inhibits the formation of secondary phase (Cu(S,Se)2) and VSn defects. Further studies demonstrate that the barrier height at the back interface is decreased and the deep level defects (CuSn defects) in CZTSSe bulk are passivated. Moreover, the carrier concentration is increased and the VOC deficit (VOC,def) is decreased significantly due to In doping. Finally, the flexible CZTSSe solar cell with 10.01% power conversion efficiency (PCE) has been obtained. The synergistic strategy of interface modification and bulk defects passivation through In incorporation provides a new thought for the fabrication of efficient flexible kesterite-based solar cells.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 10-17"},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92234651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Superior and safer lithium sulfur batteries realized by robust polysulfides-retarding dam with high flame retardance 高阻燃性的稳健性聚硫阻硫坝实现了优质、安全的硫锂电池

IF 13.1 1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-10-16 DOI: 10.1016/j.jechem.2023.09.047

Junling Wang , Yanfang Cao , Zhirong Wang , Yinquan Zhao , Chuang He , Fudong Zhao , Chaoling Han , Shui Yu

{"title":"Superior and safer lithium sulfur batteries realized by robust polysulfides-retarding dam with high flame retardance","authors":"Junling Wang , Yanfang Cao , Zhirong Wang , Yinquan Zhao , Chuang He , Fudong Zhao , Chaoling Han , Shui Yu","doi":"10.1016/j.jechem.2023.09.047","DOIUrl":"10.1016/j.jechem.2023.09.047","url":null,"abstract":"<div>The unparalleled energy density has granted lithium-sulfur batteries (LSBs) with attractive usages. Unfortunately, LSBs still face some unsurpassed challenges in industrialization, with polysulfides shuttling, dendrite growth and thermal hazard as the major problems triggering the cycling instability and low safety. With the merit of convenience, the method of designing functional separator has been adapted. Concretely, the carbon aerogel confined with CoS2 (CoS2-NCA) is constructed and coated on Celgard separator surface, acquiring CoS2-NCA modified separator (CoS2-NCA@C), which holds the promoted electrolyte affinity and flame retardance. As revealed, CoS2-NCA@C cell gives a high discharge capacity 1536.9 mAh/g at 1st cycle, much higher than that of Celgard cell (987.1 mAh/g). Moreover, the thermal runaway triggering time is dramatically prolonged by 777.4 min, corroborating the promoted thermal safety of cell. Noticeably, the higher coulombic efficiency stability and lower overpotential jointly confirm the efficacy of CoS2-NCA@C in suppressing the lithium dendrite growth. Overall, this work can provide useful inspirations for designing functional separator, coping with the vexing issues of LSBs.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 471-486"},"PeriodicalIF":13.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135762616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Toward a comprehensive hypothesis of oxygen-evolution reaction in the presence of iron and gold 在有铁和金存在的情况下，对析氧反应的综合假设

IF 13.1 1区化学

能源化学 Pub Date : 2024-02-01 Epub Date: 2023-10-12 DOI: 10.1016/j.jechem.2023.09.033

Negah Hashemi , Jafar Hussain Shah , Cejun Hu , Subhajit Nandy , Pavlo Aleshkevych , Sumbal Farid , Keun Hwa Chae , Wei Xie , Taifeng Liu , Junhu Wang , Mohammad Mahdi Najafpour

{"title":"Toward a comprehensive hypothesis of oxygen-evolution reaction in the presence of iron and gold","authors":"Negah Hashemi , Jafar Hussain Shah , Cejun Hu , Subhajit Nandy , Pavlo Aleshkevych , Sumbal Farid , Keun Hwa Chae , Wei Xie , Taifeng Liu , Junhu Wang , Mohammad Mahdi Najafpour","doi":"10.1016/j.jechem.2023.09.033","DOIUrl":"10.1016/j.jechem.2023.09.033","url":null,"abstract":"<div>This study investigates the effects of Fe on the oxygen-evolution reaction (OER) in the presence of Au. Two distinct areas of OER were identified: the first associated with Fe sites at low overpotential (≈330 mV), and the second with Au sites at high overpotential (≈870 mV). Various factors such as surface Fe concentration, electrochemical method, scan rate, potential range, concentration, method of adding K2FeO4, nature of Fe, and temperature were varied to observe diverse behaviors during OER for FeOxHy/Au. Trace amounts of Fe ions had a significant impact on OER, reaching a saturation point where the activity did not increase further. Strong electronic interaction between Fe and Au ions was indicated by X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses. In situ visible spectroscopy confirmed the formation of FeO42− during OER. In situ Mössbauer and surface-enhancedRamanspectroscopy (SERS) analyses suggest the involvement of Fe-based species as intermediates during the rate-determining step of OER. A lattice OER mechanism based on FeOxHy was proposed for operation at low overpotentials. Density functional theory (DFT) calculations revealed that Fe oxide, Fe-oxide clusters, and Fe doping on the Au foil exhibited different activities and stabilities during OER. The study provides insights into the interplay between Fe and Au in OER, advancing the understanding of OER mechanisms and offering implications for the design of efficient electrocatalytic systems.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 172-183"},"PeriodicalIF":13.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135706217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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