JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yanhui Liu,Fei Yu,Yi Jiang,Liying Wang,Ming Zhang,Jichang Zhang,Yaodong Liu,Xijia Yang,Xuesong Li,Wei Lü
As a promising method for energy harvesting , water evaporation can generate electrical energy without additional mechanical energy input. In the evaporation power generation unit based on the principle of flow potential , the low charge collection efficiency is the key factor limiting the energy output, which limits the practical application of water evaporation equipment. Based on the principle of evaporation potential , an asymmetric sandwiched hydrovoltaic device based on metallic aluminum plate and carbon cloth electrodes is designed, which not only matches the electrode, but also reduces the carrier migration route and realizes fast charge transfer and collection. The device achieves an open-circuit voltage (V oc ) of 730 mV and a short-circuit current density (J sc ) of 558 μA cm −2 , capable of producing output power density exceeding 61.7 μW cm −2 . Micro-nano electronic devices with low power consumption can be powered by integration of multiple devices. This study proposes a strategy for clean energy collection based on water evaporation.
研究领域:
能源材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Baochuan Qi,Weihong Chen,Jie Zhang,Wanying Xie,Dayi Qian,Zhengjun Yi,Hongzhi Ma
Efficient hierarchical porous carbon (HPC) and heteroatom doping electrode materials remain a formidable challenge for advanced capacitive deionization (CDI) systems for cadmium-containing wastewater purification. This study reports the successful preparation of asymmetric CDI cathodes for the electrosorption of Cd 2+ by a controlled dual-organic-salt activation strategy, and its adsorption performance and underlying mechanism were comprehensively investigated. Compared with a single K 2 C 2 O 4 activation strategy, incorporating C 8 H 16 N 2 O 6 S 2 K 2 during activation induced a chain activation–gas etching reaction, resulting in a carbon material with high heteroatom doping, exceptional specific surface area an optimized pore distribution, and abundant edge defects. Further, the optimized N, S-doped HPC2 exhibited a high specific capacitance (118 F g −1 ), enhanced reversibility, and efficient electron transfer, contributing to an exceptional electrochemical Cd 2+ adsorption capacity (125.13 mg g −1 at 1.2 V). Meanwhile, it exhibited outstanding selectivity ( K d = 18,179 mL g −1 ), remarkable cycling stability (91 % retention over 20 cycles), and superior practical performance, achieving ultralow Cd 2+ concentrations (<1 μg L −1 ) in real desulfurization wastewater via multi-stage asymmetric CDI. This work exemplifies the effectiveness of the one-step method to achieve accurate regulation of pore architecture and heteroatom co-doping, thereby providing novel insights into the mechanism of cadmium removal.
研究领域:
环境科学
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材料化学
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电化学
·
水处理技术
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纳米材料应用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Chao Sun,Liuzhen Bian,Wang Yu,Yunting Hou,Lijun Wang,Lei Xing,Chaoyi Wang,Jun Peng,Jihua Peng,Shengli An
La-doped Sr 2-x La x Fe 1.5 Mo 0.5 O 6-δ perovskite oxides are synthesized and used as a symmetric electrode to evaluate the effect of La on the crystal structure, conductivity, and catalytic activity for O 2 reduction and H 2 oxidation reaction. The electronic doping effect dominates the oversize effect in Sr 2-x La x Fe 1.5 Mo 0.5 O 6-δ oxide, resulting in unit cell volume expansion and decreased conductivity in air. In addition, the introduction of La increases the chemical structural stability of Sr 2 Fe 1.5 Mo 0.5 O 6-δ in reducing condition due to the higher La–O bond compared with Sr–O bond, leading to high catalytic activity for the H 2 oxidation reaction. At 800 °C, the R p values of Sr 1.9 La 0.1 Fe 1.5 Mo 0.5 O 6-δ symmetric cell in air and wet H 2 are as low as 0.075 and 0.21 Ω cm 2 , respectively. Moreover, the peak power densities of 769, 561, 439, and 653 mW cm −2 at 850 °C are obtained when wet H 2 , CO, CH 4, and C 3 H 8 are used as fuels on Sr 1.9 La 0.1 Fe 1.5 Mo 0.5 O 6-δ /LSGM/Sr 1.9 La 0.1 Fe 1.5 Mo 0.5 O 6-δ cell. The symmetric cell also shows excellent stability (>100 h) in wet H 2 /air, implying Sr 1.9 La 0.1 Fe 1.5 Mo 0.5 O 6-δ oxide is a promising symmetric electrode material .
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhuannian Liu,Benlong Wei,Kai Liu,Liping Wang
Molybdenum disulfide (MoS 2 ), as an appealing Faradaic material for efficient capacitive deionization (CDI), is limited by unsatisfactory electrical conductivity, inferior removal rate, and restacking. Herein, we develop a CNT/PPy/MoS 2 ternary composite using a robust 3D conductive interconnected structure CNT/PPy, constructed from multi-walled carbon nanotubes (MWCNTs) and polypyrrole (PPy) doped with dodecyl benzene sulfonate (DBS - ), as the growing substrate to mitigate the aggregation of MoS 2 nanoflakes. In this design, CNT/PPy ameliorates the wettability of the composite, provides convenient movement pathways, a fast charge transport rate, and facilitates ions diffusion process. Moreover, reinforced dispersibility and enlarged interlayer spacing of MoS 2 nanoflakes supply sufficient embedded sites for ion uptake and rapid transfer. Meanwhile, tight chemical coupling of Mo-N-C bonds can maintain the structural integrity of the composite electrode. Particularly, the symmetrical electrode configuration was established to address the kinetical unbalance of HCDI system. Consequently, the CNT/PPy/MoS 2 displays a large specific capacitance of 160.83 F g −1 at 5 mV s −1 , which is nearly 4.33 times that of MoS 2 (37.17 F g −1 ). The optimized CNT/PPy/MoS 2 cell achieves a maximum desalination capacity of 24.8 mg g −1 , ultra-high deionization rate of 5.24 mg g −1 min −1 , and superior capacity retention rate of 92.7% over 25 cycles. In addition, Na + ions were captured by the joint action of cation-exchange of DBS - -doped PPy, electrostatic adsorption of CNTs, and intercalation reaction of MoS 2 . The proposed composite structural design and electrode configuration should be a potential avenue to realize highly efficient deionization.
研究领域:
材料科学
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环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Bing Yang,Bo Wang,Futian Zhang,Jing Chen,Xuzhuo Sun,Bo Li,Mengxi Tan,Lushan Ma,Yunfeng Tian,Bo Chi
Reversible symmetric solid oxide cells (RSSOCs) offer a promising solution for bidirectional electric-hydrogen conversion, enabling integrated energy storage and conversion within a single device. However, their symmetric electrode design, which requires multifunctional catalytic activity, continues to face challenges in terms of both activity and stability. Here, we overcome these challenges by employing an innovative A-site defect and B-site Pd doping strategy in Pr 0.2 Sr 0.8 Co 0.2 Fe 0.8 O 3-δ (PSCF), which results in the in-situ exsolution of B-site metal elements. This approach results in the formation of Pd and Co-Fe nanoparticles, which significantly enhance the electrocatalytic performance of the symmetric electrodes. Electrochemical test shows that defect-engineered PSCFPd with 10 % A-site deficiency achieves a peak power density of 0.830 W cm −2 in fuel cell mode at 850 °C and a current density of 1.64 A cm −2 at 1.5 V in electrolysis mode (50 % H₂O). In addition, the cell demonstrates excellent stability, maintaining performance over 210 h in fuel cell mode and 168 h in electrolysis mode at 800 °C. First-principles calculations further confirm that the defect structure enhances B-site metal migration to the surface, promoting oxygen vacancy formation and mitigating Sr segregation, thereby improving both performance and durability. This work provides a new avenue for the design of high performance electrodes in RSSOCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Youcheng Xiao,Di Bao,Zhen Wang,Yaowen Wang,Tianmin He
Using symmetrical electrodes with the same material compositions can simplify the manufacturing process, reduce cost, and enhance the stability and reliability of solid oxide cells. Herein, we report for the first time the potential application of the La 0.3 Sr 0.7 Fe 0.7 Cr 0.3 O 3-δ (LSFC) perovskite as a symmetrical electrode for reversible protonic ceramic cells (RPCCs). The LSFC exhibits robust chemical stability in oxidizing and reducing environments and favorable chemical compatibility with BaZr 0.4 Ce 0.4 Y 0.15 Zn 0.05 O 3-δ electrolyte below 950 °C. Using LSFC as a symmetrical electrode, the electrolyte-supported RPCC delivers a maximum power density of 76 mW cm −2 in fuel cell (FC) mode at 700 °C, and a maximum current density of 30 mA cm −2 in electrolysis cell (EC) mode at 1.5 V; no significant degradation is shown under both FC and EC modes during 100 h continuous operation. The LSFC shows remarkably low polarization resistances (R p ) of 0.06 and 0.07 Ω cm 2 at 700 °C in dry and wet air, which allows it to be used directly as an air electrode; while it is 3.46 Ω cm 2 at 700 °C in 5%H 2 /Ar, which needs to improve its catalytic activity to enhance the overall performance of symmetrical electrode. These results allow us to propose a feasible strategy for applying symmetrical electrodes in RPCCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Wen Zhao,Lu Wei,Qiangang Fu,Xin Guo
Rapid development of miniature, portable and highly integrated electronics increases the demand for micro-sized power sources and on-chip energy storage units; micro-supercapacitors with in-plane electrode finger arrays are developed for this purpose. This study fabricates flexible, solid-state, interdigital micro-supercapacitors with MoO 3-x nanorods as cathode fingers and glucose-derived activated carbon nanospheres as anode fingers via a facile and economic screen-printing technique. A highly concentrated sodium alginate bio-hydrogel is used as the non-toxic and biocompatible electrolyte, which provides wider electrochemical stability window (∼2.8 V) than that of conventional aqueous electrolytes (1.23 V). The fabricated asymmetric micro-supercapacitors present outstanding electrochemical performances, for example, high areal capacitance of 47.20 mF cm −2 , superior energy density of 21.20 μWh cm −2 (47.11 mWh cm −3 ) at a power density of 0.18 mW cm −2 (0.40 W cm −3 ), and excellent capacitance retention of 95% after 10,000 cycles. The device also exhibits good mechanical stability and can be integrated into any printed circuits, demonstrating its potential application for highly customized power systems in the Internet of Things and wearable/implantable on-chip electronics with high safety requirement.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 39
·2302011
·
IF 27.8
Xinyan Zhuang,Hongrun Jin,Simin Dai,Xiaoqiong Li,Wenhuan Guo,Yan Wang,Jiabin Wu,Liang Huang,Jiangjiang Duan,Jun Zhou
The thermogalvanic cell (TGC) is considered a promising thermoelectric device for directly converting low-grade waste heat into electricity due to its low-cost and scalable properties. However, the low output and conversion efficiency limit its practical application. Herein, record-high thermoelectric conversion performances are achieved in the aqueous ferri/ferrocyanide ([Fe(CN) 6 ] 3− /[Fe(CN) 6 ] 4− ) based TGC by using the electrode of cobaltous oxide nanowires array on carbon cloth fiber. Because of the temperature-dependence reaction activity between CoO with [Fe(CN) 6 ] 4− , the asymmetric electrodes of Co 2 Fe(CN) 6 and CoO nanowires array on carbon cloth fiber are constructed at the hot anode and cold cathode, respectively. These self-assembled asymmetric electrodes exhibit specific catalysis toward electrode reactions at both ends of TGC, leading to a significant reduction in electronic activation energy. It is demonstrated that the electrodes have high catalytic activity and high specific surface area, enabling the construction of a high-efficiency TGC with a Carnot-relative efficiency ( η r ) of 14.8% and a maximum output power density ( P max ) of 24.5 W m −2 . This work offers an asymmetric electrode engineering pathway for the continuous evolution of TGCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 23
·4405-4411
·
IF 3.849
Jie Ding,Huajing Fang,Zhipeng Lian,Jiangwei Li,Qianrui Lv,Liduo Wang,Jia-Lin Sun,Qingfeng Yan
Methylammonium lead iodide perovskite (MAPbI3) has made a re-entry into the literature nowadays for its extraordinary characteristics, such as high absorption of light, long carrier diffusion length, high carrier mobility, low trap-state density, low surface recombination velocity and ease of attainment. Here, we report a self-powered photodetector based on a CH3NH3PbI3 single crystal by employing asymmetric Au–Al electrodes. The key issue of this photodetector was the metal–semiconductor contacts, owing to the Schottky junction between them. By setting the channel length between the Au–Al electrodes to 30 μm for sufficient electron–hole pair separation and transportation, the device showed good performance under 1 sun illumination. The short-circuit photocurrent density and open-circuit voltage were 6.86 mA cm−2 and 0.7 V, respectively. The photocurrent was almost 2 orders of magnitude larger than that based on a perovskite polycrystalline film with a similar device structure. More importantly, the device could detect the lowest noticeable incident power density down to 1 × 10−8 W cm−2. Under this weak light intensity, the responsivity was as high as 0.24 A W−1 without any bias. The photoresponse also had a broadband ranging from 375 nm to 808 nm accompanied by a fast response speed.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Fujuan Luo,Yisong Wang,Lei Han,Kai Tao
Layered double hydroxides (LDHs) represent an important class of battery-type electrode materials for supercapacitors (SCs), but they suffer from serious agglomeration and low electronic conductivity. In this paper, amorphous/crystalline CoSx/NiCo LDH heterogeneous nanosheet arrays have been constructed via partial sulfurization of zeolitic imidazolate framework-L (ZIF-L) template followed by etching with nickel nitrate. The amorphous CoSx not only provides rich active sites but also acts as a scaffold for anchoring NiCo LDH, preventing its aggregation. The hollow cavity facilitates charge transport and relieves volume expansion during electrochemical process. Besides, the binder-free configuration reduces contact resistance and “dead volume”. With these merits, CoSx/NiCo LDH displays a high specific capacitance of 1903.8 F g–1 at 1 A g–1 with an excellent rate performance (76.1% at 10 A g–1). In addition, the two-electrode cell assembled from CoSx/NiCo LDH and activated carbon (AC) outputs an energy density of up to 54.66 W h kg–1 corresponding to a power density of 800 W kg–1 at 1 A g–1 along with satisfactory cycle life (82% after 10,000 cycles at 10 A g–1).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 7
·1460
·
IF 3.2
Jiajia Cui,Yueyue Sun,Chaofan Yin,Hao Wang,Zhengrong Liu,Zilin Zhou,Kai Wu,Jun Zhou
The development of symmetrical solid oxide fuel cells with identical cathode and anode is beneficial for thermal matching and reducing the cost. Herein, proton-conducting electrolyte and novel high catalytic activity electrode material for symmetrical solid oxide fuel cells are proposed. Ni-doping at the B-site of (Sr0.8Ce0.2)0.95FeO3−δ(SCF) indicates reduced cell edge lengths, cell volume, and a more porous honeycomb structure. The B-site elements in oxide tend to have a high oxidation state via Ni-doping. Simple doping modification in SCF causes better thermal matching between the electrode and electrolyte and form more oxygen vacancies at the operating temperature. At the anode side, Ni-doping improves the stability of the symmetric electrode in reducing the atmosphere. The polarization resistance of symmetrical cells for new electrode material is half of the original both in oxidation and reduction atmosphere, which indicates boosted electrochemical performance for the cathode and anode. At the same time, Ni-doping reduces the impedance activation energy of the anode reaction in symmetric cells. The output performance of the cell is 210.4 mW·cm−2at 750 °C and the thickness of the electrolyte is 400 μm, achieving a highly efficient symmetrical electrode in proton ceramic fuel cells. The new finding of materials provides a novel high efficiency symmetrical electrode and proposes guidance for the improvement of solid oxide fuel cells at a reduced temperature.
研究领域:
材料科学
·
能源工程
·
固体氧化物燃料电池研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2020
·Vol. 11
·期 6
·2002961
·
IF 25.245
Bipeen Dahal,Kisan Chhetri,Alagan Muthurasu,Tanka Mukhiya,Arjun Prasad Tiwari,Jagadis Gautam,Jun Youb Lee,Dong Chul Chung,Hak Yong Kim
Large reversible biaxial ( xy ) stretching in energy storage devices is now an urgent requirement for the field of stretchable electronics to enable reliability in practical applications. Here, a fascinating stretching machine is designed and used for xy -stretching of a high-performance supercapacitor device without performance degradation. A trimetallic metal organic framework (MOF)-derived ternary metal oxide on graphitic-2200 knitted carbon fiber (MOF-ZNCO@g-KCF), activated carbon loaded onto drilled knitted carbon fiber (AC@g-KCF-d), and a poly-vinyl alcohol, poly-ethylene oxide, and potassium hydroxide (PVA/PEO/KOH) based hydrogel polymer film are used as a faradic cathode, a double layer anode, and an electrolyte, respectively, to integrate the biaxially stretchable asymmetric supercapacitor (BSASC) device. The fabricated MOF-ZNCO@g-KCF//AC@g-KCF-d BSASC maintains an outstanding performance consistency at different xy -stretched conditions, even after repeated deformations. Notably, after 10 000 galvanostatic charge–discharge cycles, the BSASC in the xy -biaxial stretched condition is retained at 93.7%, and after 100 successive stretch–relax cycles for the same stretching dimension it still retains a 92.48% capacity, demonstrating excellent mechanical and electrochemical stability. The exceptional performance consistency in the xy -stretched position, demonstrates that the BSASC is one of the best performers among the stretchable supercapacitors reported to date.
研究领域:
材料科学
·
能源存储
·
柔性电子
✓ 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）