能源化学最新文献

{"title":"The design and engineering strategies of metal tellurides for advanced metal-ion batteries","authors":"Wenmiao Zhao ,&nbsp;Xiaoyuan Shi ,&nbsp;Bo Liu ,&nbsp;Hiroshi Ueno ,&nbsp;Ting Deng ,&nbsp;Weitao Zheng","doi":"10.1016/j.jechem.2023.09.044","DOIUrl":"10.1016/j.jechem.2023.09.044","url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 579-598"},"PeriodicalIF":13.1,"publicationDate":"2023-10-13","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}

{"title":"Effect of crystal morphology of ultrahigh-nickel cathode materials on high temperature electrochemical stability of lithium ion batteries","authors":"Bi Luo ,&nbsp;Hui Li ,&nbsp;Haoyu Qi ,&nbsp;Yun Liu ,&nbsp;Chuanbo Zheng ,&nbsp;Weitong Du ,&nbsp;Jiafeng Zhang ,&nbsp;Lai Chen","doi":"10.1016/j.jechem.2023.09.043","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.043","url":null,"abstract":"<div><p>Higher nickel content endows Ni-rich cathode materials LiNi<em>_x</em>Co<em>_y</em>Mn₁<em>_−x−y</em>O₂ (<em>x</em> &gt; 0.6) with higher specific capacity and high energy density, which is regarded as the most promising cathode materials for Li-ion batteries. However, the deterioration of structural stability hinders its practical application, especially under harsh working conditions such as high-temperature cycling. Given these circumstances, it becomes particularly critical to clarify the impact of the crystal morphology on the structure and high-temperature performance as for the ultrahigh-nickel cathodes. Herein, we conducted a comprehensive comparison in terms of microstructure, high-temperature long-cycle phase evolution, and high-temperature electrochemical stability, revealing the differences and the working mechanisms among polycrystalline (PC), single-crystalline (SC) and Al doped SC ultrahigh-nickel materials. The results show that the PC sample suffers a severe irreversible phase transition along with the appearance of microcracks, resulting a serious decay of both average voltage and the energy density. While the Al doped SC sample exhibits superior cycling stability with intact layered structure. In-situ XRD and intraparticle structural evolution characterization reveal that Al doping can significantly alleviate the irreversible phase transition, thus inhibiting microcracks generation and enabling enhanced structure. Specifically, it exhibits excellent cycling performance in pouch-type full-cell with a high capacity retention of 91.8% after 500 cycles at 55 °C. This work promotes the fundamental understanding on the correlation between the crystalline morphology and high-temperature electrochemical stability and provides a guide for optimization the Ni-rich cathode materials.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 327-335"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137116016","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}

{"title":"Manipulating Na occupation and constructing protective film of P2-Na0.67Ni0.33Mn0.67O2 as long-term cycle stability cathode for sodium-ion batteries","authors":"Yiran Sun ,&nbsp;Pengfei Zhou ,&nbsp;Siyu Liu ,&nbsp;Zhongjun Zhao ,&nbsp;Yihao Pan ,&nbsp;Xiangyan Shen ,&nbsp;Xiaozhong Wu ,&nbsp;Jinping Zhao ,&nbsp;Junying Weng ,&nbsp;Jin Zhou","doi":"10.1016/j.jechem.2023.09.042","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.042","url":null,"abstract":"<div><p>P2-Na_0.67Ni_0.33Mn_0.67O₂ (NNMO) is promising cathode material for sodium-ion batteries (SIBs) due to its high specific capacity and fast Na⁺ diffusion rate. Nonetheless, the irreversible P2-O2 phase transformation, Na⁺/vacancy ordering, and transition metal (TM) dissolution seriously damage its cycling stability and restrict its commercialization process. Herein, Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp (LiPO₂F₂) film-forming electrolyte additive. The Zn/Ti co-doping regulates the occupancy ratio of Na_e/Na_f at Na sites and disorganizes the Na⁺/vacancy ordering, resulting in a faster Na⁺ diffusion kinetics and reversible P2-Z phase transition for P2-Na_0.67Ni_0.28Zn_0.05Mn_0.62Ti_0.05O₂ (NNZMTO). Meanwhile, the LiPO₂F₂ additive can form homogeneous and ultrathin cathode-electrolyte interphase (CEI) on NNZMTO surface, which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution, surface structure transformation, and micro-crack generation. Combination studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with LiPO₂F₂ additive. As a result, the NNZMTO displays outstanding capacity retention of 94.44% after 500 cycles at 1C with 0.3 wt% LiPO₂F₂, excellent rate performance of 92.5 mA h g⁻¹ at 8C with 0.1 wt% LiPO₂F₂, and remarkable full cell capability. This work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials, which provides a promising direction for developing high-performance cathodes for SIBs.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 603-611"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92212743","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}

{"title":"In-situ coating and surface partial protonation co-promoting performance of single-crystal nickel-rich cathode in all-solid-state batteries","authors":"Maoyi Yi ,&nbsp;Jie Li ,&nbsp;Mengran Wang ,&nbsp;Xinming Fan ,&nbsp;Bo Hong ,&nbsp;Zhian Zhang ,&nbsp;Aonan Wang ,&nbsp;Yanqing Lai","doi":"10.1016/j.jechem.2023.09.046","DOIUrl":"10.1016/j.jechem.2023.09.046","url":null,"abstract":"<div><p>The poor electrochemical performance of all-solid-state batteries (ASSBs), which is assemblied by Ni-rich cathode and poly(ethylene oxide) (PEO)-based electrolytes, can be attributed to unstable cathodic interface and poor crystal structure stability of Ni-rich cathode. Several coating strategies are previously employed to enhance the stability of the cathodic interface and crystal structure for Ni-rich cathode. However, these methods can hardly achieve simplicity and high efficiency simultaneously. In this work, polyacrylic acid (PAA) replaced traditional PVDF as a binder for cathode, which can achieve a uniform PAA-Li (Li<em>_x</em>PAA (0 &lt; <em>x</em> ≤ 1)) coating layer on the surface of single-crystal LiNi_0.83Co_0.12Mn_0.05O₂ (SC-NCM83) due to H⁺/Li⁺ exchange reaction during the initial charging-discharging process. The formation of PAA-Li coating layer on cathode can promote interfacial Li⁺ transport and enhance the stability of the cathodic interface. Furthermore, the partially-protonated surface of SC-NCM83 casued by H⁺/Li⁺ exchange reaction can restrict Ni ions transport to enhance the crystal structure stability. The proposed SC-NCM83-PAA exhibits superior cycling performance with a retention of 92% compared with that (57.3%) of SC-NCM83-polyvinylidene difluoride (PVDF) after 200 cycles. This work provides a practical strategy to construct high-performance cathodes for ASSBs.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 137-143"},"PeriodicalIF":13.1,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135761814","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}

{"title":"Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries","authors":"Ruo Wang ,&nbsp;Jiawei Li ,&nbsp;Bing Han ,&nbsp;Qingrong Wang ,&nbsp;Ruohong Ke ,&nbsp;Tong Zhang ,&nbsp;Xiaohu Ao ,&nbsp;Guangzhao Zhang ,&nbsp;Zhongbo Liu ,&nbsp;Yunxian Qian ,&nbsp;Fangfang Pan ,&nbsp;Iseult Lynch ,&nbsp;Jun Wang ,&nbsp;Yonghong Deng","doi":"10.1016/j.jechem.2023.10.002","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.10.002","url":null,"abstract":"<div><p>Li metal batteries using high-voltage layered oxides cathodes are of particular interest due to their high energy density. However, they suffer from short lifespan and extreme safety concerns, which are attributed to the degradation of layered oxides and the decomposition of electrolyte at high voltage, as well as the high reactivity of metallic Li. The key is the development of stable electrolytes against both high-voltage cathodes and Li with the formation of robust interphase films on the surfaces. Herein, we report a highly fluorinated ether, 1,1,1-trifluoro-2-[(2,2,2-trifluoroethoxy) methoxy] ethane (TTME), as a co-solvent, which not only functions as a diluent forming a localized high concentration electrolyte (LHCE), but also participates in the construction of the inner solvation structure. The TTME-based electrolyte is stable itself at high voltage and induces the formation of a unique double-layer solid electrolyte interphase (SEI) film, which is embodied as one layer rich in crystalline structural components for enhanced mechanical strength and another amorphous layer with a higher concentration of organic components for enhanced flexibility. The Li||Cu cells display a noticeably high Coulombic efficiency of 99.28% after 300 cycles and Li symmetric cells maintain stable cycling more than 3200 h at 0.5 mA/cm² and 1.0 mAh/cm². In addition, lithium metal cells using LiNi_0.8Co_0.1Mn_0.1O₂ and LiCoO₂ cathodes (both loadings ∼3.0 mAh/cm²) realize capacity retentions of &gt;85% over 240 cycles with a charge cut-off voltage of 4.4 V and 90% for 170 cycles with a charge cut-off voltage of 4.5 V, respectively. This study offers a bifunctional ether-based electrolyte solvent beneficial for high-voltage Li metal batteries.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 532-542"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92280355","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}

{"title":"Physics-based battery SOC estimation methods: Recent advances and future perspectives","authors":"Longxing Wu ,&nbsp;Zhiqiang Lyu ,&nbsp;Zebo Huang ,&nbsp;Chao Zhang ,&nbsp;Changyin Wei","doi":"10.1016/j.jechem.2023.09.045","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.045","url":null,"abstract":"<div><p>The reliable prediction of state of charge (SOC) is one of the vital functions of advanced battery management system (BMS), which has great significance towards safe operation of electric vehicles. By far, the empirical model-based and data-driven-based SOC estimation methods of lithium-ion batteries have been comprehensively discussed and reviewed in various literatures. However, few reviews involving SOC estimation focused on electrochemical mechanism, which gives physical explanations to SOC and becomes most attractive candidate for advanced BMS. For this reason, this paper comprehensively surveys on physics-based SOC algorithms applied in advanced BMS. First, the research progresses of physical SOC estimation methods for lithium-ion batteries are thoroughly discussed and corresponding evaluation criteria are carefully elaborated. Second, future perspectives of the current researches on physics-based battery SOC estimation are presented. The insights stated in this paper are expected to catalyze the development and application of the physics-based advanced BMS algorithms.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 27-40"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136853469","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}

{"title":"Aqueous electrochemical delithiation of cathode materials as a strategy to selectively recover lithium from waste lithium-ion batteries","authors":"Pier Giorgio Schiavi,&nbsp;Andrea Giacomo Marrani,&nbsp;Olga Russina,&nbsp;Ludovica D'Annibale,&nbsp;Francesco Amato,&nbsp;Francesca Pagnanelli,&nbsp;Pietro Altimari","doi":"10.1016/j.jechem.2023.09.040","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.040","url":null,"abstract":"<div><p>Lithium recovery from end-of-life Li-ion batteries (LIBs) through pyro- and hydrometallurgical recycling processes involves several refining stages, with high consumption of reagents and energy. A competitive technological alternative is the electrochemical oxidation of the cathode materials, whereby lithium can be deintercalated and transferred to an electrolyte solution without the aid of chemical extracting compounds. This article investigates the potential to selectively recover Li from LIB cathode materials by direct electrochemical extraction in aqueous solutions. The process allowed to recovering up to 98% of Li from high-purity commercial cathode materials (LiMn₂O₄, LiCoO₂, and LiNi_1/3Mn_1/3Co_1/3O₂) with a faradaic efficiency of 98% and negligible co-extraction of Co, Ni, and Mn. The process was then applied to recover Li from the real waste LIBs black mass obtained by the physical treatment of electric vehicle battery packs. This black mass contained graphite, conductive carbon, and metal impurities from current collectors and steel cases, which significantly influenced the evolution and performances of Li electrochemical extraction. Particularly, due to concomitant oxidation of impurities, lithium extraction yields and faradaic efficiencies were lower than those obtained with high-purity cathode materials. Copper oxidation was found to occur within the voltage range investigated, but it could not quantitatively explain the reduced Li extraction performances. In fact, a detailed investigation revealed that above 1.3 V vs. Ag/AgCl, conductive carbon can be oxidized, contributing to the decreased Li extraction. Based on the reported experimental results, guidelines were provided that quantitatively enable the extraction of Li from the black mass, while preventing the simultaneous oxidation of impurities and, consequently, reducing the energy consumption of the proposed Li recovery method.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 144-153"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740101","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}

{"title":"Review and prospects on the low-voltage Na2Ti3O7 anode materials for sodium-ion batteries","authors":"Jun Dong ,&nbsp;Yalong Jiang ,&nbsp;Ruxing Wang ,&nbsp;Qiulong Wei ,&nbsp;Qinyou An ,&nbsp;Xiaoxing Zhang","doi":"10.1016/j.jechem.2023.09.039","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.039","url":null,"abstract":"<div><p>Due to its low cost and natural abundance of sodium, Na-ion batteries (NIBs) are promising candidates for large-scale energy storage systems. The development of ultralow voltage anode materials is of great significance in improving the energy density of NIBs. Low-voltage anode materials, however, are severely lacking in NIBs. Of all the reported insertion oxides anodes, the Na₂Ti₃O₇ has the lowest operating voltage (an average potential of 0.3 V vs. Na⁺/Na) and is less likely to deposit sodium, which has excellent potential for achieving NIBs with high energy densities and high safety. Although significant progress has been made, achieving Na₂Ti₃O₇ electrodes with excellent performance remains a severe challenge. This paper systematically summarizes and discusses the physicochemical properties and synthesis methods of Na₂Ti₃O₇. Then, the sodium storage mechanisms, key issues and challenges, and the optimization strategies for the electrochemical performance of Na₂Ti₃O₇ are classified and further elaborated. Finally, remaining challenges and future research directions on the Na₂Ti₃O₇ anode are highlighted. This review offers insights into the design of high-energy and high-safety NIBs.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 446-460"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92285270","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}

{"title":"Toward a comprehensive hypothesis of oxygen-evolution reaction in the presence of iron and gold","authors":"Negah Hashemi ,&nbsp;Jafar Hussain Shah ,&nbsp;Cejun Hu ,&nbsp;Subhajit Nandy ,&nbsp;Pavlo Aleshkevych ,&nbsp;Sumbal Farid ,&nbsp;Keun Hwa Chae ,&nbsp;Wei Xie ,&nbsp;Taifeng Liu ,&nbsp;Junhu Wang ,&nbsp;Mohammad Mahdi Najafpour","doi":"10.1016/j.jechem.2023.09.033","DOIUrl":"10.1016/j.jechem.2023.09.033","url":null,"abstract":"<div><p>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 FeO<em>_x</em>H<em>_y</em>/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-enhanced<!--> <!-->Raman<!--> <!-->spectroscopy (SERS) analyses suggest the involvement of Fe-based species as intermediates during the rate-determining step of OER. A lattice OER mechanism based on FeO<em>_x</em>H<em>_y</em> 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.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 172-183"},"PeriodicalIF":13.1,"publicationDate":"2023-10-12","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}

{"title":"End-group modulation of phenazine based non-fullerene acceptors for efficient organic solar cells with high open-circuit voltage","authors":"Yahui Zhang ,&nbsp;Yafeng Li ,&nbsp;Ruixiang Peng ,&nbsp;Yi Qiu ,&nbsp;Jingyu Shi ,&nbsp;Zhenyu Chen ,&nbsp;Jinfeng Ge ,&nbsp;Cuifen Zhang ,&nbsp;Zheng Tang ,&nbsp;Ziyi Ge","doi":"10.1016/j.jechem.2023.09.035","DOIUrl":"10.1016/j.jechem.2023.09.035","url":null,"abstract":"<div><p>Phenazine-based non-fullerene acceptors (NFAs) have demonstrated great potential in improving the power conversion efficiency (PCE) of organic solar cells (OSCs). Halogenation is known to be an effective strategy for increasing optical absorption, refining energy levels, and improving molecular packing in organic semiconductors. Herein, a series of NFAs (PzIC-4H, PzIC-4F, PzIC-4Cl, PzIC-2Br) with phenazine as the central core and with/without halogen-substituted (dicyanomethylidene)-indan-1-one (IC) as the electron-accepting end group were synthesized, and the effect of end group matched phenazine central unit on the photovoltaic performance was systematically studied. Synergetic photophysical and morphological analyses revealed that the PM6:PzIC-4F blend involves efficient exciton dissociation, higher charge collection and transfer rates, better crystallinity, and optimal phase separation. Therefore, OSCs based on PM6:PzIC-4F as the active layer exhibited a PCE of 16.48% with an open circuit voltage (<em>V</em>_oc) and energy loss of 0.880 V and 0.53 eV, respectively. Accordingly, this work demonstrated a promising approach by designing phenazine-based NFAs for achieving high-performance OSCs.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 461-468"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135660785","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}