Nano Energy最新文献

{"title":"Wind Speed Adaptive Triboelectric Nanogenerator with Low Start-up Wind Speed, Enhanced Durability and High Power Density via the Synergistic Mechanism of Magnetic and Centrifugal Forces for Intelligent Street Lamp System","authors":"Leilei Shu, Lin Fang, Feixiang Wang, Zhe Li, Yuanchao Guo, Haonan Zhang, Zixun Wang, Wen He, Aamir Rasheed, Kangqi Fan, Guozhang Dai, Hejun Du, Peihong Wang","doi":"10.1016/j.nanoen.2024.110487","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110487","url":null,"abstract":"Minimizing start-up wind speed, reducing material wear and enhancing power density are three pivotal concerns for the TENG for harvesting wind energy. Here, a wind speed adaptive triboelectric nanogenerator (WSA-TENG) via a synergistic mechanism of magnetic and centrifugal forces is proposed. Owing to this new mechanical synergistic mechanism, WSA-TENG can operate in non-contact mode at low wind speed and in soft contact mode at high wind speed. This is significantly different from the previously reported TENGs with dual-mode automatic switching mode. As a result, WSA-TENG simultaneously achieves low start-up wind speed (1.6<!-- --> <!-- -->m/s), enhanced durability and high power density, which enables WSA-TENG ideal for wind energy harvesting in the actual environment. WSA-TENG can achieve the maximum peak power density of 64.2<!-- --> <!-- -->mW·m^-2·m^-1s at 3.3<!-- --> <!-- -->m/s wind speed. Moreover, it can maintain 99.4% of initial electrical output after continuous operation of 90,000 cycles. The demonstrations show that WSA-TENG can supply power to temperature/humidity sensor and transmitter to realize wireless real-time monitoring of temperature/humidity and realize wind speed monitoring through electrical signal analysis, which has great potential applications in intelligent street lamp system. This work provides a strategy for simultaneously lowing start-up wind speed, boosting durability and improving power density of TENG.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"14 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Hybrid Generator with Spring Coupling effect for low-grade water wave energy harvesting","authors":"Honggui Wen, Heng Liu, Xinchun Wang, Guanlin Liu, Pu Zhou, Weiyu Zhou, Liang Tuo, Hang Qu, Lixia Zhai, Lingyu Wan, Junyi Zhai","doi":"10.1016/j.nanoen.2024.110488","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110488","url":null,"abstract":"Harvesting continuously water wave energy for on-site power generation offers a promising solution to address the offshore energy shortage. However, challenges arise in ocean wave energy harvesting during low-level sea states. Here, we propose a spring-coupled enhanced hybrid nanogenerator (SC-EHG), wherein the synergistic effects of gravity and elastic force allow it to achieve remarkable power generation capacity under low-level excitation. At a frequency of 0.1<!-- --> <!-- -->Hz, the SC-EHG becomes operational at a tilted angle of merely 2 °, with sensitivity and energy harvesting direction range improved by sixfold and threefold, respectively, in comparison to configurations lacking a spring coupler. In the real ocean, under wave conditions characterized by a significant frequency (f_s) of 0.31<!-- --> <!-- -->Hz and a significant wave height (H_s) of 7.87<!-- --> <!-- -->cm, the output frequency of the SC-EHG reaches up to 0.75<!-- --> <!-- -->Hz, an effective increase of 2.41 times. At this point, the maximum transferred charge (1.43 μC) and maximum open-circuit voltage (422.6<!-- --> <!-- -->V) of a TENG module approximate the output values recorded under laboratory wave conditions (f_s = 0.82<!-- --> <!-- -->Hz, H_s = 6.17<!-- --> <!-- -->cm). Under ocean wave conditions of f_s = 0.21<!-- --> <!-- -->Hz and H_s = 4.52<!-- --> <!-- -->cm, the SC-EHG successfully powered a marine sensing system, enabling 1024<!-- --> <!-- -->m of long-distance wireless communication by charging a 30 mF capacitor to 8.35<!-- --> <!-- -->V. The robust performance of the SC-EHG at low level sea states (≤ 1) offers significant support for the establishment of a sustainable marine Internet of Things.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"42 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fe3+-substitutional Doping of Nanostructured Single-crystal TiNb2O7 for Long-stable Cycling of Ultra-fast Charging Anodes","authors":"Fan Yu, Bobby Miglani, Shuaishuai Yuan, Rana Yekani, Kirk H. Bevan, George P. Demopoulos","doi":"10.1016/j.nanoen.2024.110494","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110494","url":null,"abstract":"Titanium niobate (TiNb₂O₇, TNO) has emerged as a promising lithium-ion battery (LIB) anode option for fast charging applications. However, the cycling durability of TNO under extremely fast charging is still limited, and the corresponding structural alteration mechanism remains unclear. This research reports an ultra-fast charging anode with long-term cycling stability enabled by Fe substitution in single-crystal TNO nanostructures. The underlying mechanism via which Fe substitution affects TNO’s electronic properties, ionic diffusion kinetics, and structural stability is revealed through combined theoretical modeling and experimental characterization. The optimal Fe³⁺-doped TNO monocrystalline material (Fe_0.05Ti_0.95Nb₂O_6.975) (Fe5-TNO) provides a remarkable charge capacity of 238<!-- --> <!-- -->mAh/g under a 10<!-- --> <!-- -->C (6<!-- --> <!-- -->min charging time only) extreme fast-charging protocol (coupled with 1<!-- --> <!-- -->C discharge), and a high capacity of 200<!-- --> <!-- -->mAh/g at 5<!-- --> <!-- -->C with high cycling retention of 85% after 1000 cycles. Our calculations suggest that Fe³⁺ substitutional doping leads to a lowering of the band gap coupled with a reduction in the Li⁺ diffusion energy barrier. Overall, these factors contribute to reduced capacity decay and extreme fast charging, together promoting durable cycling performance suitable for LIB usage. Reflection electron energy loss spectroscopy (REELS) reveals that Fe³⁺ doping narrows the band gap from 3.75<!-- --> <!-- -->eV of TNO to approximately 3.40<!-- --> <!-- -->eV for Fe5-TNO; after initial lithiation, both TNO and Fe³⁺-doped TNO are transformed into a higher-conductivity phase, in agreement with density functional theory (DFT) predictions. Meanwhile Fe³⁺ doping is shown exhibited to decrease the Li⁺ diffusion energy barrier, boosting the Li⁺ diffusion coefficient by one order of magnitude, from 10^-13 to 10^-12 cm²/s. This research provides new insights into the design of next-generation fast-charging LIB anodes via DFT-guided substitutional doping.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"108 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultra-compact single-electrode triboelectric nanogenerators for self-powered wear sensing of reciprocating sealings","authors":"Xiantao Zhang, Song Wang, Likun Gong, Zhihong Yao, Fei Guo, Chi Zhang, Qinkai Han","doi":"10.1016/j.nanoen.2024.110490","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110490","url":null,"abstract":"Intelligent mechanical sealing is crucial for the advancement of equipment intelligence and the Internet of Things (IoT), as it effectively addresses significant challenges such as the monitoring of mechanical seals in high-end equipment. However, the limited reliability of indirect measurements and the compromises in the structural integrity of the original seal caused by implantable measurements pose constraints on the efficacy of monitoring wear in seals. Here, this study proposes a smart ultra-compact triboelectric reciprocating sealing system (UC-TERS) capable of monitoring motion states and wear conditions. By utilizing the existing structure of commercial seals and applying abrasion-resistant coatings to the moving parts, the UC-TERS enables an ultra-compact design. The electrical output performances of various materials were investigated, and diamond-like carbon (DLC) coating and sealing made of polytetrafluoroethylene (PTFE) mixed with carbon fiber were selected to improve the self-powering and self-sensing capabilities. Variations in the output voltage and current caused by the load resistance were measured. Experiments involving various speeds and a constant speed were conducted to verify the self-sensing ability of the UC-TERS in detecting the motion state. In addition, a sealing wear test was performed to diagnose the wear conditions in the reciprocating mechanism based on the UC-TERS output. By combining the UC-TERS with deep learning algorithms, different wear conditions were accurately classified. Subsequently, the UC-TERS was applied to industrial servo actuators, and it demonstrated that it could achieve self-powering and self-sensing capabilities with a high reliability. The results of this study showcase the broad application potential of UC-TERS in the development of IoT.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"6 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-Adhesive ILn@MXene Multifunctional Hydrogel with Excellent Dispersibility for Human-Machine Interaction, Capacitor, Antibacterial and Detecting Various Physiological Electrical Signals in Humans and Animals","authors":"Xikun Zhang, Yang Su, Jiahe Xu, Yexi Jin, He Zhang, Guangpeng Ma, Jinxin Xu, Meng Zhou, Xinpu Zhou, Fengliang Cao, Yu Chang, Yukai Wang, Bingqi Zhao, Shurui Yi, Junzheng Chen, Di Fang, Xue Lv, Lu Liu","doi":"10.1016/j.nanoen.2024.110484","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110484","url":null,"abstract":"The poor dispersion of MXene in hydrogel weakens the sensitivity and cycling stability of flexible sensors. In this work, we regulated the interlayer spacing of MXene by employing ionic liquids (IL) with varying chain lengths (C=4, 8, 12, 16, 18). It was found that the IL_n with a chain length of C=16 caused the most significant change in interlayer spacing during intercalation, effectively inhibiting the self-restacking of MXene and preventing its aggregation. Building on this finding, we developed the A-PS-0.06I₁₆@M hydrogel with a polyacrylic acid (PAA) network and polydopamine-coated silica (PS). The fabrication of a highly stretchable, adhesive, and conductive hydrogel, exhibited excellent mechanical properties, including up to 1903% stretchability, elastic modulus of 20 kPa and 806<!-- --> <!-- -->kJ·m^-3 toughness. The hydrogel demonstrated superior electrical conductivity (14.8 mS·cm^-1) and high sensitivity (GF=7.64), these features make it particularly effective in monitoring human motion signals, electrocardiograms (ECG), electromyograms (EMG), and electrical signals in rats. Moreover, the hydrogel exhibited great potential in human-machine interface (HMI)、capacitor and antibacterial effects under 808<!-- --> <!-- -->nm near-infrared light irradiation，indicating broad applications in flexible electronics, sensors, and biomedical engineering.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"18 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photovoltaic windows based on ultrathin transition-metal dichalcogenides: natural indoor illumination spectra and energy-saving potential","authors":"Carlos Bueno-Blanco, Simon A. Svatek, Francisco M. Gomez-Campos, Antonio Marti, Elisa Antolin","doi":"10.1016/j.nanoen.2024.110483","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110483","url":null,"abstract":"Semitransparent photovoltaic windows are attractive for building-integrated applications because they can regulate natural indoor illumination while generating power. In this work, we assess the potential of transition metal dichalcogenide (TMDC) semitransparent solar cells as emerging technology for this application. We model a semitransparent ultrathin photovoltaic device containing a MoS₂ or WSe₂ absorber and find that it can be optimized to produce a balanced absorption of the sunlight spectrum because of the unique optical properties of these materials, eliminating the common problem of the undesired coloring of the transmitted light. The device also exhibits high angular absorptance. We estimate a potential saving between 16% (winter) and 23% (summer) in the electricity consumption of a high-rise office building located in Madrid, Spain, by implementing TMDCs semitransparent windows with an average photopic transmission (APT) of 24%. Notably, this is compatible with a high quality in the transmitted light: the color rendering index (CRI) of the PV windows exceeds 90 for an APT between 23% and 65%. These results, along with the fact that TMDCs can be deposited using low-cost, scalable methods, indicate that TMDCs hold great potential for developing color-neutral, power-generating building glazing.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"25 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"All inorganic perovskite-based artificial synaptic device for self-optimized neuromorphic computing","authors":"Yinghao Zhang, Delu Chen, Yifan Xia, Mengjia Guo, Kefu Chao, Shuhan Li, Shifan Ma, Xin Wang","doi":"10.1016/j.nanoen.2024.110486","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110486","url":null,"abstract":"Artificial synapse that can mimic physiological synaptic behaviors has attracted extensive attentions in intelligent robots. However, it is an extreme challenge for artificial synapses to achieve self-optimized feedback of mimicking biological behavior. Herein, a novel self-powered artificial neural pathway (SANP) is developed by coupling CsPbBr_xI_(3-x)-based artificial synaptic device and triboelectric nanogenerator (TENG) for self-optimized neuromorphic computing. The TENG can convert external mechanical stimulation into electricity that acts not only as a supply source to power the SANP but also as electrical stimulation to transmit to the synaptic device for neuromorphic computing. The synaptic device’s conductance can be well modulated by the electrical stimulation, which tunes the height of Schottky barrier between Ag and CsPbBr_xI_(3-x), to simulate the regulation of synaptic plasticity. Simultaneously, the synaptic device can implement synaptic functions of learning and memory. Furthermore, the SANP as self-powered mechano-nociceptor can successfully mimic the nociceptor features of “threshold”, “relaxation” and “allodynia”. More importantly, under repeated mechanical stimulation, the SANP with synaptic self-optimized feedback features enables the learning and memory training and the robotic arm’s grabbing and spreading simultaneously. Consequently, the SANP can effectively accomplish signal transmission, processing, and learning tasks without external power supply, which demonstrates potential application in neuromorphic computing and intelligent robots.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"113 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A wide-frequency triboelectric vibration sensor for self-powered machinery health monitoring","authors":"Juan Cui, Xin Li, Keping Wang, Xiaolong Yan, Yongqiu Zheng, Chenyang Xue","doi":"10.1016/j.nanoen.2024.110481","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110481","url":null,"abstract":"Abnormal vibration is usually a precursor to structural damage and performance degradation industrial equipment and transportation. Vibration detection at critical locations such as electrical motors and bearings within large equipment has emerged as an indispensable method for machinery health monitoring. Current vibration detection instruments mostly need to be powered by cables or batteries, which has application limitations in complex moving equipment and restricted space. In this paper, a disc-like triboelectric nanogenerator (DL-TENG) with a multi-sized honeycomb structure is proposed as an innovative solution for achieving wide band and high precision acceleration detection of the vibration. Multi-diameter polytetrafluoroethylene (PTFE) balls are used as friction materials to achieve the high voltage output of the TENG, providing sufficient energy for the detection circuit. By carefully designing suitable honeycomb structures for PTFE balls of different diameters, the ability to detect broadband vibration signals is obtained. The experimental results demonstrate that DL-TENG with honeycomb structure and multi-size PTFE balls can detect acceleration signals ranging from 10 to 2000 Hz, and the acceleration measurement range can reach 1-11<!-- --> <!-- -->m/s² with an acceleration resolution of 0.1<!-- --> <!-- -->m/s². Moreover, DL-TENG can output more than 80<!-- --> <!-- -->V peak-to-peak under vibration conditions of 11<!-- --> <!-- -->m/s². And under vibration conditions of 8<!-- --> <!-- -->m/s², the DL-TENG can fully charge a 100 μF capacitor to 5<!-- --> <!-- -->V in just 100<!-- --> <!-- -->seconds. By equipping a special circuit for DL-TENG, wireless self-powered vibration detection is realized. This study is expected to be applied in the scenario of vibration information collection in complex ring vibration environment and provides a new paradigm for the realization of self-powered vibration sensors.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"64 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Suction-forced triboelectricity escalation by incorporating biomimetic 3-dimensional surface architectures","authors":"Jihun Son, Ahmed Mahfuz Tamim, Hyunseung Kim, Seung Hwan Jeon, Rayyan Ali Shaukat, Minwoo Song, Minjin Kim, Changsoon Choi, Tae-Heon Yang, Sooyeon Cho, Changhyun Pang, Chang Kyu Jeong","doi":"10.1016/j.nanoen.2024.110480","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110480","url":null,"abstract":"Triboelectric nanogenerators (TENGs), which operate on the principles of electrostatic induction and triboelectrification, have emerged as highly promising devices for energy harvesting, offering vast potential to address the challenges of energy depletion. In this study, we present a hierarchical bio-inspired architecture designed to enhance the triboelectric effect through a physically adhesive mechanism, achieved by creating a highly deformable 3D microstructure. This three-dimensional (3D) architecture, inspired by the male diving beetle, features properties that increase the contact area and compressibility of the interface by forming conformal contact with the electrode surface in both dry and wet environments. The architecture enhances van der Waals forces and generates multiple physical adhesion forces at the interface, leading to significant charge transfer. Compared to flat surfaces as well as various 3D bio-inspired architectures such as linear-shaped pillars and mushroom-like architectures, diving beetle inspired architecture demonstrated the highest triboelectric performance, generating voltage (~42<!-- --> <!-- -->V) and current (~1008<!-- --> <!-- -->nA) in dry conditions at 16<!-- --> <!-- -->N of force. The results of this study offer a new perspective, demonstrating that triboelectricity can be efficiently generated through the strategic design of physically adhesive structures, as opposed to conventional TENGs that rely on structureless designs or chemical adhesives.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"51 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A d33 piezoionic hydrogel with bioinspired multi-gradient structure for enhanced mechano-iontronic transduction","authors":"Longwei Li, Yangshi Shao, Luyao Jia, Zi Hao Guo, Zheng Li, Zhong Lin Wang, Xiong Pu","doi":"10.1016/j.nanoen.2024.110477","DOIUrl":"https://doi.org/10.1016/j.nanoen.2024.110477","url":null,"abstract":"Mechanoelectric transduction based on piezoionic polarization mechanisms diverges from piezoelectric polarization, and is promising for various human-interfaced applications; yet, strategies are urgently demanded to enrich the device design beyond the state-of-the-art <em>d</em>_<em>31</em> mode and also to enhance the electrical outputs. Herein, inspired by the mechanoionic conversion of natural articular cartilage, we realize a <em>d</em>_<em>33</em> piezoionic hydrogel with multi-gradient structure and enhance its output by more than an order of magnitude. The geometry and modulus gradients are designed to amplify the deformation-induced convective ionic current, and the charge gradient is introduced to enlarge the cation-anion transfer rate difference. By synergizing with these three gradients, a multi-gradient piezoionic hydrogel exhibits significantly improved electrical outputs under uniform compression, achieving a <em>d</em>_<em>33</em> coefficient of 27.9 μC N^-1. Then, piezoionic hydrogel arrays are fabricated for the demonstration of applications in self-powered electrostimulation-promoted wound healing. Therefore, we present general principles and practical materials-engineering approaches for enhancing piezoionic effect of hydrogels, which will greatly promote its future applications.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"6 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}