Journal of Energy Storage
·
2025
·
IF 9.8
Liuxue Sun,Jihuai Wu,Weichun Pan,Lina Tan,Xia Chen,Chunyan Deng,Qi Chen,Yu Lin,Miaoliang Huang,Zhang Lan
With the development of the Internet of Things and wearable devices, flexible photocapacitors capable of both energy harvesting and storage have attracted significant attention. However, issues such as low overall conversion efficiency, poor stability, and low energy density in flexible devices urgently need to be addressed. In this work, a self-charging photocapacitor is designed by integrating a flexible quasi-solid-state supercapacitor with two silicon solar cells connected in series, and the matching conditions between photovoltaic conversion unit and energy storage unit are optimized. The best-performing photocapacitor achieve a coupling efficiency of 95.84 %, a Joule efficiency of 76.90 %, and an overall conversion efficiency of 13.44 %, with a high specific capacitance (149.29 mF∙cm −2 ) and an excellent energy density (19.31 μWh∙cm −2 ), along with great stability in photo-charging/dark-discharge cycles. This study provides new insights for the current research on flexible self-powered systems.
研究领域:
能源材料
·
光电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hao Jiang,Lizhang Wang,Bai Gao,Yiran Li,Yadan Guo,Mengning Zhuo,Kaixuan Sun,Binyu Lu,Meiyu Jia,Xiaoxia Yu,Huidong Wang,Yongge Li
In order to achieve high energy-conversion efficiency during CO 2 electro-conversion, OH − oxidation was employed as a counter reaction vs . CO 2 electroreduction for formate production on a Tin cathode. The formate faradic efficiency (FE) and production rate were 80.54% and 0.1549 mmol h −1 cm −2 using KOH anolyte at −1.80 V vs . SCE in 8 h operation, which were about 13.71% and 53.03% higher than that for KHSO 4 anolyte, respectively. This is mainly due to alkaline anolyte is beneficial to stabilize the catholyte pH, thus avoiding the competitive hydrogen evolution reaction, while maintaining fast electron transfer rate for the formation of CO 2* − . Moreover, KOH anolyte achieved the lowest power consumption (4.81 kWh kg −1 formate) compared with KHCO 3 and KHSO 4 . Polarization and electrochemical impedance spectroscopy measurements indicated that such energy-saving performance enhancement originated from low equilibrium potential and fast oxidation kinetics associated with the conversion of OH − to H 2 O, which reduced the anode potential and cell voltage. This study puts forward another insight for cost-effective CO 2 reduction, which is of great value to improve the balance of energy input and output during CO 2 conversion, thus having implication in enriching strategy in the field of electroreduction.
研究领域:
化学工程
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2019
·Vol. 3
·期 11
·3000-3008
·
IF 4.912
Wei Huang,Gaoyue Hu,Cheng Tian,Xiaohong Wang,Jinchun Tu,Yang Cao,Kexi Zhang
Solar steam generation has emerged as a promising and sustainable method of addressing the water shortage issue. Although various materials and structures have been reported, designing a highly efficient steam generation device with excellent salt resistant performance remains a great challenge. For the first time, a polypyrrole (PPy)–wood device has been prepared through a simple “soak and polymerization” process by in situ polymerization of pyrrole monomers into a three-dimensional (3D) porous wood matrix. The PPy particles decorated on the wood matrix can convert incident light into heat while the 3D porous wood matrix can further enhance light absorption based on light harvesting and multiple scattering effects, which allows the PPy–wood light absorption to reach as high as 97.5% in the spectral range from 250 nm to 2500 nm. Owing to the low thermal conductivity of wood, the PPy–wood can localize the converted heat at the surface of the device, enabling efficient steam generation. The hydrophilicity and the numerous aligned microchannels of the PPy–wood ensure constant water supply to the air–water interface. All these merits endow the PPy–wood with a high solar energy conversion efficiency of 83% under 1 Sun, with an evaporation rate of 1.33 kg m−2 h−1. Moreover, the fabricated PPy–wood also shows good structure stability and cycling stability as well as excellent salt resistant performance. Benefiting from the low-cost of wood and the simple fabrication process, the PPy–wood with the above merits is one of the most suitable candidates for solar desalination.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xin Zuo,Bohyung Kim,Baibai Liu,Dongmei He,Le Bai,Wenqi Wang,Cunyun Xu,Qunliang Song,Chunyang Jia,Zhigang Zang,Donghwa Lee,Xiong Li,Jiangzhao Chen
The interfacial carrier nonradiative recombination resulting from defects and energy barrier at buried interface hinders further enhancement of power conversion efficiency (PCE) and stability of perovskite solar cells. Herein, we report a simple and effective buried interface passivation strategy based on cation engineering through employing a new type of sulfonium salt ((2-carboxyethyl) dimethyl sulfonium chloride, CDSC) together with reference molecule (3-dimethylamino propionic acid hydrochloride, DPAH) to modify the interface between perovskite and electron transport layers. It is theoretically and experimentally revealed at the atomic scale that CDSC and DPAH chemically interact with both SnO 2 and perovskite layer and accordingly well bridge both layers. Both modifiers can not only passivate the defects from the surface of perovskite and SnO 2 films, but also reduce interfacial energy barrier via improving energy band alignment. CDSC are certified to be more effective in defect passivation and energy band modulation than DPAH, for the first time revealing that sulfonium cations are superior to commonly adopted ammonium cations. Finally, the DPAH and CDSC-modified devices achieve a PCE of 21.44% and 22.22%, respectively, far outperforming the control device (20.72%). The unsealed devices with CDSC maintain 92.5% of their initial efficiency after thermal aging for 1272 h.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Chem
·
2023
·
IF 23.5
Wenchao Ma,Shunji Xie,Biao Zhang,Xiaoyang He,Xi Liu,Bingbao Mei,Fanfei Sun,Zheng Jiang,Li Lin,Qinghong Zhang,Bin Ren,Gang Fu,Xile Hu,Ye Wang
Electrocatalytic upgrading of CO to value-added multi-carbon (C 2+ ) compounds is a promising approach to efficient carbon utilization. However, current full-cell systems have low energy conversion efficiencies under practical conditions due to the requirement of high cell voltages for an industrially relevant current density. Here, we present a lattice tension strategy to enhance CO chemisorption and carbon–carbon coupling on copper catalysts at high CO coverages, which usually cause excessive dipole-dipole repulsion and are detrimental to C–C coupling. A current density of 1.0 A cm −2 with 84% Faradaic efficiency of C 2+ compounds is achieved at 2.4 V on a spindle-shaped copper with 4% lattice tension. The C 2+ products are formed with nearly 100% selectivity and in a 41% single-pass yield (on a molar carbon basis). This work demonstrates a great potential of electrocatalytic CO reduction for the practical synthesis of high-value chemicals from CO 2 and abundant carbon resources.
研究领域:
化学工程
·
材料科学
·
电催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 12
·6556-6564
·
IF 11.9
Xuan Sha,Jiang Sheng,Weichuang Yang,Jingsong Sun,Chunhui Shou,Luyan Zhang,Ningjun Zhang,Zhiqin Ying,Xi Yang,Hongbin Zhao,Jichun Ye
The defects at the interface of the SnO2 electron transport layer (ETL) and the perovskite absorber, as the charge-carrier recombination centers, play an important role in determining the performance of perovskite solar cells (PSCs). Here, we use an organic salt, i.e., 1-ethyl-3-methylimidazolium diethyl phosphate (EMIM DEP), to passivate such defects, which could simultaneously enhance the interface quality and perovskite crystallization. The DEP groups saturate the dangling bonds of surface Sn atoms, efficiently suppressing the interfacial charge recombination and tailoring the energy alignment of the SnO2/perovskite interface for better carrier extraction. Additionally, EMIM DEP not only improves the crystal growth of perovskite, but also passivates the defects of the perovskite grain boundary. Consequently, the EMIM DEP-based device presents a champion power conversion efficiency (PCE) of 23.21%, which is much higher than that of the control device (21.14%). The EMIM DEP-based device retains 95% and 87% of its original PCE after storage for over 2000 h in a 30 ± 5% RH ambient air and under operation at the maximum power point for 700 h, respectively. Therefore, it is demonstrated that interface modification via such an organic salt is a feasible and efficient approach to improve the passivation and contact properties for high-efficiency and stable PSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 18
·3835
·
IF 4.967
Guoping Zhang,Lihong Wang,Chaoyue Zhao,Yajie Wang,Ruiyu Hu,Jiaxu Che,Siying He,Wei Chen,Leifeng Cao,Zhenghui Luo,Mingxia Qiu,Shunpu Li,Guangye Zhang
All-polymer solar cells (all-PSCs) are organic solar cells in which both the electron donor and the acceptor are polymers and are considered more promising in large-scale production. Thanks to the polymerizing small molecule acceptor strategy, the power conversion efficiency of all-PSCs has ushered in a leap in recent years. However, due to the electrical properties of polymerized small-molecule acceptors (PSMAs), the FF of the devices is generally not high. The typical electron transport material widely used in these devices is PNDIT-F3N, and it is a common strategy to improve the device fill factor (FF) through interface engineering. This work improves the efficiency of all-polymer solar cells through interfacial layer engineering. Using PDINN as the electron transport layer, we boost the FF of the devices from 69.21% to 72.05% and the power conversion efficiency (PCE) from 15.47% to 16.41%. This is the highest efficiency for a PY-IT-based binary all-polymer solar cell. This improvement is demonstrated in different all-polymer material systems.Keywords:organic photovoltaics;all-polymer solar cells;power conversion efficiency;electron transport layer
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
The Innovation
·
2025
·
IF 25.7
Jianwei Zong,Wenjie Ma,Yanan Jiang,Fei Wu,Xiulan He,Ping Yu,Lanqun Mao
Atomically thin two-dimensional membranes are promising for osmotic energy generation. However, the trade-off between permeability and selectivity remains a long-standing bottleneck. Herein, we demonstrate that a cationic AB-stacking covalent-organic framework (COF) bilayer achieves high ion conductivity and selectivity. Through precise molecular design and the Langmuir-Blodgett (LB) technique, we fabricate an anion-selective COF bilayer (EB-COF) using tetradentate 4,4′,4″,4′′′-(porphyrin-5,10,15,20-tetrayl)tetrabenzaldehyde (TFPP) and bidentate ethidium bromide (EB) with a covalently tethered pyridinium moiety. The EB-COF bilayer shows a record-high output power density of 7,174 W m −2 (0.5/0.01 M NaCl), significantly outperforming the AA-stacking PDA-COF bilayer constructed with TFPP and neutral p -phenylenediamine (PDA). This exceptional performance stems from highly ordered sub-2-nm nanopores, exceptional pore utilization efficiency, and a large surface charge density of 4.4 mC m −2 , which together synergistically enhance anion selectivity and ion permeability. This work not only provides fundamental insights into the structure-performance relationship of permselective membranes but also offers a promising strategy for high-efficiency osmotic energy harvesting.
研究领域:
材料科学
·
能源工程
·
分子设计
✓ 已验证
DOI
PubMed
高影响因子
DESALINATION
·
2021
·
IF 9.501
Shuo Wang,Yukang Fan,Fei Wang,Yanning Su,Xu Zhou,Zhaoqi Zhu,Hanxue Sun,Weidong Liang,An Li
Solar steam generation (SSG) is a green and sustainable way for desalination . Herein, we report for the first time the electrodeposition fabrication of bilayer photothermal material (named PPy-NF-PUS) for efficient desalination, which was prepared by electrodeposited polypyrrole on nickel foam (PPy-NF) as the upper layer for solar absorption and polyurethane sponge (PUS) as the lower layer for water pumping and thermally insulating. Taking advantages of superhydrophilic wettability , strong light absorption and the porous network structure of PPy-NF, in well combination with the low thermal conductivity and super-absorbent capacity of PUS , the PPy-NF-PUS shows excellent energy conversion efficiency of 82.18% under 1 sun irradiation. Moreover, the PPy-NF-PUS shows excellent salt-resistant performance, e.g., when salt was placed on the surface of the solar evaporator of PPy-NF-PUS, it could dissolve quickly. In addition, the PPy-NF-PUS was modified by composite coating to achieve a strong hydrophilic-oleophobic wettability. Such unique wettability endows the modified PPy-NF-PUS shows excellent oil-repellent performance. Besides, an outdoor water evaporation and collection device was designed, and the average evaporation rate of PPy-NF-PUS was 1.2562 kg m −2 h −1 under about 0.755 sun irradiation, thus showing great potential for practical application in SSG, by combination with its simple, potentially scalable fabrication process.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Wentong Yang,Yixiong Ji,Wangxian Chen,Yining Pan,Zifei Chen,Shaoyang Wu,Salvy P. Russo,Yang Xu,Trevor A. Smith,Anthony Chesman,Paul Mulvaney,Fangyang Liu
Sodium (Na) doping is a well-established technique employed in chalcopyrite and kesterite solar cells. While various improvements can be achieved in crystalline quality, electrical properties, or defect passivation of the absorber materials by incorporating Na, a comprehensive demonstration of the desired Na distribution in CZTSSe is still lacking. Herein, a straightforward Na doping approach by dissolving NaCl into the CZTS precursor solution is proposed. It is demonstrated that a favorable Na ion distribution should comprise a precisely controlled Na + concentration at the front surface and an enhanced distribution within the bottom region of the absorber layer. These findings demonstrated that Na ions play several positive roles within the device, leading to an overall power conversion efficiency of 12.51%.
研究领域:
材料科学
·
可再生能源
·
光伏技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 21
·9014-9026
·
IF 3.553
Hu Xiaoran,Hu Ying,Guo Zhen,Liu Shuai,Zhang Qian,Zhang Xiaokun,Xiang Yong
In this paper, a direct alternating current hybrid generator is proposed through the combination of piezoelectric hydroxyapatite (HA)/polylactide (PLLA) composite film with a graphene/silicon dynamic Schottky diode. The proposed hybrid generator provides an overall energy conversion efficiency of 65% under a single mechanical force. This percentage marks the highest efficiency compared with previously reported piezoelectric generators and dynamic Schottky diode generators. The primary mechanisms of the proposed generator are the built-in electric field separation of the diffusion of carriers in the moving Schottky diode, and the synergistic effect of the hydrogen bond and dipole interactions between HA and PLLA for the direct and alternating part of the proposed HA/PLLA/graphene/silicon hybrid generator, respectively. Moreover, the hybrid generator provides a maximum output voltage of 4.7 V for the alternating output and current of 2.9 μA for the direct output, which can simultaneously illuminate several LEDs. Thus, the proposed generator shows great potential in practical applications for converting mechanical energy for self-powered systems or wearable energy sources.
研究领域:
材料科学
·
能源技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2018
·
IF 5.018
Haochen Liu,Shang Li,Wei Chen,Dan Wang,Chen Li,Dan Wu,Junjie Hao,Ziming Zhou,Xinzhong Wang,Kai Wang
Luminescent solar concentrator (LSC) integrated with c-Si photovoltaic cells (PV cells) in building integrated photovoltaics (BIPV) could grow up to be an important element of our life for energy harvest in the future. Heavy metal free quantum dots (QDs) are promising for LSC applications, which can be controlled to possess effective large Stokes Shift and low reabsorption of emission that benefit their applications in BIPV. In our work, different amount and size of SiO 2 particles were added to CuInS 2 /ZnS QDs based LSCs to realize highly efficient scattering enhanced LSC (S-LSC) devices. Since SiO 2 particles induced scattering effect, we achieved a power conversion efficiencies (PCE) of 4.20%, which showed an improvement of 60.3% compared with the pure QDs based LSC without SiO 2 particles. This study suggests a new method of scattering enhancement to realize better performance for LSC.
研究领域:
材料科学
·
可再生能源
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）