International Journal of Electrochemical Science
·
2023
·Vol. 8
·期 1
·670-677
·
IF 1.5
Borong Wu,Yonghuan Ren,Daobin Mu,Cunzhong Zhang,Xiaojiang Liu,Guchang Yang,Feng Wu
A low cost and environment benign salt of sodium chloride (NaCl) was used as an additive in low temperature electrolyte (Lithium hexafluorophosphate(LiPF6) / ethylene carbonate(EC) / propylene carbonate(PC) / ethyl methyl carbonate(EMC) (0.14/0.18/0.68, wt.)) to improve the electrochemical performance of mesocarbon microbeads(MCMB) anode. The initial Li extraction capacity of MCMB electrode was 304.8mAh g -1 in this electrolyte when the content of EC was remarkably reduced for a better conductivity. Whereas, a value of 357.6mAh g -1 was attained in the presence of NaCl additive. The electrochemical performance of MCMB was largely enhanced in the low temperature electrolyte with NaCl. The effect of NaCl additive on the electrode performance was examined by cyclic voltammetry(CV), electrochemical impedance spectroscopy(EIS), scanning electron microscopy(SEM) and X-ray photoelectron spectroscopic(XPS).
研究领域:
电化学
·
材料科学
·
能源存储
·
锂离子电池
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电极材料
·
电解液工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 11
·16075-16081
·
IF 4.672
Yang Yang,Haoran Zhang,Xun Zhu,Dingding Ye,Rong Chen,Qiang Liao
Summary Tremendous research has focused on the wearable electronic device, leading to the basic requirement of suitable power sources. Herein, we report one bendable paper-based zinc-air battery with a novel hollow channel structure. It achieves a maximum power density of 138 mW/cm 2 , outperforming the state-of-art paper-based batteries reported previously. The boosted performance is assigned to the low charge transfer resistance and facilitated mass transfer from the hollow structure. It demonstrates the positive design of microchannel structure is profitable for the power-generation enhancement, and offers a possible route to commercialize the paper-based power generators.
研究领域:
电化学能源
·
柔性电子学
·
材料科学
·
纳米能源
·
生物医学工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2014
·Vol. 40
·期 9
·15199-15206
·
IF 2.086
Yanbo Yang,Xiao Peng,Si Chen,Liping Lin,Bao Zhang,Yaqing Feng
The novel hierarchical compact layer involving ZnO and TiO 2 blocking films is used to improve the overall performance of dye-sensitized solar cells. The ZnO compact films are fabricated as a bottom layer to block the electrons injection to the conductive glass and improve the open-circuit voltage. The TiO 2 compact layer is employed to suppress back electron transfer and avoid ZnO contacting the acid dyes directly. The short-circuit current density of the DSSC containing the hierarchical compact layer is improved by 30% compared to that of one with only ZnO as the compact layer. The open-circuit voltage is increased by 4% after introducing the additional TiO 2 blocking layer between the ZnO compact layer and mesoporous TiO 2 layer. Overall, the short-circuit current density, open-circuit voltage and solar energy conversion efficiency are enhanced by 15.3%, 3.7% and 29.6%, respectively, relative to the traditional DSSC without any blocking layers. The ZnO–TiO 2 blocking layer has been characterized by electrochemical impedance spectroscopy , open-circuit voltage decay and dark current measurement to reveal the mechanism of short-circuit current density and open-circuit voltage improvement.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
光伏技术
·
表面科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Liying Xian,Min Li,Daping Qiu,Chuang Qiu,Cheng Yue,Feng Wang,Ru Yang
Layered P-type structures are integral to most competitive cathodes for sodium-ion batteries (SIBs). However, the performance of P2-type cobalt-based layered materials is unsatisfactory owing to a low initial discharge capacity caused by Na deficiency. Here, Mn-doped Na x CoO 2 with a P3 structure is synthesized by using a modified solvent-thermal method with calcination . A structural analysis shows that partial Mn doping can effectively control P3 phase formation and increase d -layer spacing, thereby improving the diffusion of Na + . In addition, enhanced electrochemical performance is observed in optimized P3-type Na 0.26 Co 0.48 Mn 0.52 O 2 (NCMO-1), which exhibits a reversible specific capacity of 64 mAh g −1 at 3 A g −1 and a good capacity retention of 58% after 500 cycles. Furthermore, the Na-ion full cell constructed with an NCMO-1 cathode and a hard carbon anode yields a competitive energy density of 175.9 Wh kg −1 at 0.4 A g −1 with excellent cycle stability. Thus, this work provides a new viewpoint on the development of P3 structural materials with higher electrochemical performance for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 48
·2205163
·
IF 15.153
Shuhao Tian,Juanjuan Huang,Hongcen Yang,Guo Liu,Qi Zeng,Di Wang,Xiao Sun,Kun Tao,Guohan Liu,Shanglong Peng
The low utilization rate of active materials, shuttle effect of lithium polysulfides (LiPSs), and slow reaction kinetics lead to the extremely low efficiency and poor high current cycle stability of lithium sulfur batteries (Li–S batteries). In this paper, a self-supporting multicomponent hierarchical network aerogel is proposed as the modified cathode (S/GO@MX@VS 4 ). It consists of graphene (GO) and MXene nanosheets (MX) loaded with VS 4 nanoparticles. The experimental results and first-principles calculations show that the GO@MX@VS 4 aerogel has strong adsorption and reversible conversion effects on LiPSs. It can not only inhibit the shuttle effect and improve the utilization rate of active substances by keeping the chain crystal structure of VS 4 , but also promote the reversibility and kinetics of the reaction by accelerating the liquid–solid transformation in the reduction process and the decomposition of insoluble Li 2 S in the oxidation process. The GO@MX@VS 4 aerogel modified cathode with a multicomponent synergy exhibits the capacity ratios (Q 1 /Q 2 ) at different discharge stages is close to the theoretical value (1:2.8), and the capacity decay per cycle is 0.019% in 1200 cycles at 5C. Also, a high areal capacity of 6.90 mAh cm −2 is provided even at high sulfur loading (7.39 mg cm −2 ) and low electrolyte/sulfur ratio (E/S, 8.0 µL mg −1 ).
研究领域:
电化学储能
·
材料科学
·
纳米材料
·
能源化学
·
电池技术
·
表面催化
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 5
·1165-1175
·
IF 2.5
Liu Shuling,Zhang Wei,An Yiming,Li Ying,Wang Jie,Wang Chao
The Si-based flexible electrodes attracted increasing research interests owing to the growing demand for high-performance flexible energy storage devices. Herein, a facile and smart self-assembly strategy is adopted to address huge volume expansion and particle aggregation issues of Si-based anodes, and a high-performance freestanding film anode (NC@Si/CNTs/N-rGO) is synthesized. The 3D-crosslinked porous graphene-CNTs networks offer abundant electric conductive pathways, high active sites, large internal space to accommodate the expansion of Si NPs, and facilitate Li + diffusion and insertion/extraction kinetics. The synergistic effect between the well-dispersed Si/NC nanoparticles and 3D porous networks significantly enhances electrochemical performance of Si NPs. The as-prepared NC@Si/CNTs/N-rGO electrode exhibits a high reversible specific capacity of 1089 mAh·g −1 at a charge–discharge current density of 1 A·g −1 after 500 cycles. Even at 2 A·g −1 , the electrode still exhibits an excellent reversible specific capacity of 606 mAh·g −1 after 300 cycles. These indicate that the NC@Si/CNTs/N-rGO is a promising candidate for high-performance flexible anode material in lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
先进电池技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 12
·15589-15595
·
IF 3.45
Sining Yun,Yuzhi Hou,Chen Wang,Yangliang Zhang,Xiao Zhou
Mo-based binary/ternary nanocomposites were designed and prepared via soft template synthesis by combining Mo 2 C and Bi/Mo 2 C into mesoporous carbon (MC). The materials were characterized by using various analytical and electrochemical techniques . When Mo 2 C/MC composites were used as counter electrodes (CEs) in iodide-mediated dye-sensitized solar cells (DSSCs), the power conversion efficiencies (PCEs) of the cells reached 7.29%, and the performance of DSSC with Bi/Mo 2 C/MC was 8.06%, which was much higher than that of the cell with Pt CE (7.08%). The excellent electrochemical stability of Mo-based nanocomposites in triiodide/iodide electrolyte indicated that they could be promising alternatives to Pt electrodes in DSSCs. This work provided a new idea for the development of metal/carbide/carbon nanocomposite CE materials for DSSCs.
研究领域:
材料科学
·
能源化学
·
电化学
·
纳米科技
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 38
·23415-23421
·
IF 3.108
Sheng Yuan,Ming-Jian Zhang,Xiaoyang Yang,Zongwei Mei,Yongji Chen,Feng Pan
MoS2, a representative two-dimensional transition metal dichalcogenide, gains significant interest due to its unique layered structure and electronic structure. In this work, a novel MoS2-based hybrid thin film was constructed by disordered stacking of MoS2–NMP hybrid particles, which were mainly composed of MoS2(NMP)3 molecules stacking in a nearly-parallel manner through S⋯H–C hydrogen bonds. Interestingly, it presents a higher work function (5.42 eV) than Au (5.32 eV), and a unique thickness-dependent conductivity with p-type semiconductor characteristic. Using it as the back contact of CdTe solar cells, the efficiency was improved by 2.6% compared to the traditional cells, mainly from the great improvement in short-circuit current density (Jsc). This significant improvement in solar performance was ascribed to the matchable energy levels at the CdTe/MoS2-based thin film interface and its unique thickness-dependent conductivity. This work opens a new direction for the extensive applications of TMD-based materials.
研究领域:
材料科学
·
光伏技术
·
纳米材料
·
半导体物理
·
表面科学
·
能源材料
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2021
·Vol. 33
·期 10
·4635-4639
·
IF 6.779
Shuai Chen,Chuang Yu,Shaoqing Chen,Linfeng Peng,Cong Liao,Chaochao Wei,Zhongkai Wu,Shijie Cheng,Jia Xie
Solid-state batteries with high energy density and safety are promising next-generation battery systems. However, lithium oxide and lithium sulfide electrolytes suffer low ionic conductivity and poor electrochemical stability, respectively. Lithium halide solid electrolyte shows high conductivity and good compatibility with the pristine high-voltage cathode but limited applications due to the high price of rare metal. Zr-based lithium halides with low cost and high stability possess great potential. Herein, a small amount of In 3+ is introduced in Li 2 ZrCl 6 to synthesize Li 2.25 Zr 0.75 In 0.25 Cl 6 electrolytes with a high room temperature Li-ion conductivity of 1.08 mS/cm. Solid-state batteries using Li 2.25 Zr 0.75 In 0.25 Cl 6 /Li 5.5 PS 4.5 Cl 1.5 bilayer solid electrolytes combined with Li-In anode and pristine LiNi 0.7 Mn 0.2 Co 0.1 O 2 cathode deliver high initial discharge capacities under different cut-off voltages. This work provides an effective strategy for enhancing the conductivity of Li 2 ZrCl 6 electrolytes, promoting their applications in solid-state batteries.
研究领域:
材料科学
·
电化学
·
固体离子学
·
能源存储
·
无机非金属材料
·
电池技术
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 21
·期 1
·2403051
·
IF 13
Yandi Luo,Hongli Ma,Nafees Ahmad,Usman Ali Shah,Zhuanghao Zheng,Shuo Chen,Zhenghua Su,Jun Zhao,Xianghua Zhang,Guangxing Liang
Antimony selenide (Sb 2 Se 3 ) has demonstrated considerable potential and advancement as a light-absorbing material for thin-film solar cells owing to its exceptional optoelectronic characteristics. However, challenges persist in the crystal growth, particularly regarding the nucleation mechanism during pre-selenization process for Sb 2 Se 3 . The defects originating from this process significantly impact the quality of the absorber layer, leading to the degradation in the power conversion efficiency (PCE) of the device. Herein, the evolution of pre-selenization using rapid thermal processing (RTP) on the crystallization quality of Sb 2 Se 3 film is systematically investigated. By optimizing the initial nucleation process during pre-selenization, resulting in a reduction of grain boundaries and nucleation centers, the Sb 2 Se 3 thin films demonstrate enhanced crystallinity and pinholes-free morphology. It is found that the improved quality of the grain interior and interfaces of the Sb 2 Se 3 absorber can mitigate intrinsic defects within the bulk layer, and passivate interfacial defect recombination. As a result, the short circuit current density ( J SC ) is elevated to 28.97 mA cm −2 , and a competitive efficiency of 9.03% is achieved in Sb 2 Se 3 device. This study provides comprehensive insight into the process of crystal growth and the mechanism for defect suppression, which holds guiding significance for advancing photovoltaic performance.
研究领域:
材料科学
·
光伏技术
·
半导体物理
·
薄膜制备
·
凝聚态物理
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Mengyi Wang,Li Yin,Mingqi Li,Shaohua Luo,Chao Wang
To develop low-cost, high-capacity and long-life anode materials for lithium-ion batteries, glucose-C and F-doped C coated SiO composites with adjustable pore structure (p-SiO@gl-C@F-doped C) are synthesized by facile and scalable methods. The combination of the heterogeneous dual-carbon shells and porous structure significantly promotes the reaction kinetics of the electrode, effectively suppresses and buffers the volume expansion of SiO, and largely enhances the stability of solid electrolyte interface of the electrode. In a half cell, the optimized p-SiO@gl-C@F-doped C (7:3) composite shows a stable discharge capacity of 785 mAh g −1 at a current density of 200 mA g −1 . The discharge capacity is maintained at 772 mAh g −1 after 200 cycles. At a current density of 400 mA g −1 , the electrode shows a discharge capacity of 633 mAh g −1 after 500 cycles, with a capacity degradation of ∼0.0096% per cycle from the 2nd cycle to the 500th cycle. The full cell which is composed of the commercial LiFePO 4 as a cathode and the optimized composite as an anode, exhibits high capacity and good cycling stability.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米复合材料
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 31
·18612-18618
·
IF 10.733
Shuo Wang,Xiaofu Xu,Xue Zhang,Chengzhou Xin,Bingqing Xu,Liangliang Li,Yuan-Hua Lin,Yang Shen,Baohua Li,Ce-Wen Nan
All-solid-state lithium-ion batteries (ASSLIBs) owing to their advantage of enhanced safety are considered to be a promising candidate for next-generation energy storage devices. However, the poor cycling performance and low areal capacities of ASSLIBs with S, Li2S or traditional oxide cathodes hinder the development of high-energy-density ASSLIBs. Herein, a Li6PS5Cl solid-state electrolyte has been systematically investigated for use as a cathode active material in ASSLIBs for the first time. ASSLIBs employing Li6PS5Cl as both the active material and electrolyte with a Li–In alloy anode are fabricated. A Li6PS5Cl-based cell with an active material loading of 3.1 mg cm−2 exhibits a high discharge capacity of around 535 mA h g−1 after 650 cycles at 56 mA g−1 (∼0.1C) at room temperature, which is the highest value among ASSLIBs using sulfide SSEs as active materials and is even comparable with those of cells with S, Li2S or transition metal sulfides as the active material. This superior long-term cycling performance is attributed to the highly reversible electrochemical activity of Li6PS5Cl revealed by ex situ XRD and XPS analyses.
研究领域:
电化学
·
能源材料
·
固态离子学
·
储能技术
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）