MATERIALS LETTERS
·
2019
·
IF 3.019
Baoe Li,Zhenghao Sun,Yan Zhao,Zisheng Zhang
Lithium-sulfur batteries were considered as a new generation of high energy density batteries, but their commercialization was limited by volume expansion, the low conductivity of sulfur and shuttle effect. To overcome these issues, we developed a three-dimensional carbon nanotube/Fe 3 O 4 microspheres via spray drying and calcination as sulfur host materials (S/CNT/Fe 3 O 4 ). In this three-dimensional microsphere structure, interwoven CNT backbone offers a robust conductive network with sufficient space for loading sulfur, and the polar Fe 3 O 4 nanoparticles can enhance chemical adsorption of polysulfide. Benefiting from these advantages, the S/CNT/Fe 3 O 4 cathode exhibit high initial discharge capacity (1270 mAh g −1 at 0.2 C), superior rate performance (602 mAh g −1 at 3 C), and long cyclic stability (only 0.084% capacity decay per cycle for 300 cycles at 1 C).
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yanhua Zhang,Xinglong Gao,Zijun Tang,Yuhang Mei,Xing Xiang,Jiadong Deng
The lithium dendrites growth in Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolytes has severely restricted the development of all-solid-state lithium batteries. Herein, two different dynamic properties interlayers of electronically conductive Al and an electronically non-conductive Al 2 O 3 are constructed at the Li/LLZO interface, and the lithium dendrite growth mechanism is explored. Results show that battery with Al interlayer occur internal short circuit in 95 cycles, while the battery with annealed Al 2 O 3 interlayer has good cycle stability of 1000 cycles with polarization voltage below 0.1 V. Besides, dendritic lithium dendrites can be clearly observed at the LLZO grain boundaries of battery with Al interlayer. Raman and XPS results show that the Al 2 O 3 interlayer reacts with Li + during the charge and discharge process to form a Li-Al-O compound which is Li + conductive. It is concluded that the lithium dendrite inhibition mechanism of the Li-Al-O compound interlayer is that it can promote the Li + conduction from LLZO to lithium anode to undergo a lithium deposition reaction, and prevents electrons from conducting to LLZO and combine with Li + to occur lithium dendrite growth. While for the Al interlayer, electrons can reach LLZO through the interlayer to combine with Li + thus occurring the lithium dendritic growth.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Yingchao Hu,Wenqiang Liu,Yuandong Yang,Xianliang Tong,Qianjun Chen,Zijian Zhou
Li 4 SiO 4 sorbents for high-temperature CO 2 removal have drawn extensive attention owing to their potential application in carbon capture and storage (CCS). The major challenge in the application lies in the poor CO 2 capture performance under realistic conditions of low CO 2 concentrations, owing to the dense structure and poor porosity. In this work, Li 4 SiO 4 sorbents were prepared with porous micromorphologies and large contact areas using a variety of organometallic Li-precursors, achieving fast CO 2 sorption kinetics, high capacity and excellent cyclic stability at a low CO 2 concentration (15 vol%). It was found that a high conversion of ~ 74% was maintained for pure Li 4 SiO 4 even after 100 sorption/desorption cycles. Moreover, by doping with Na 2 CO 3 to reduce the CO 2 diffusion resistance, the conversion of the sorbent was further enhanced to 93.2%. The enhancement mechanism of alkali carbonate have been proven here to be ascribed to the formation of the eutectic melt of Li/Na carbonates, the existence and function of which has been confirmed in this study.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Junpeng Xue,Deping Wang,Xiaohong Xia,Yuxi Chen,Hongbo Liu
Here, we report a nano-sized red phosphorous/biomass-derived porous carbon (P@BDPC) which is employed as anode materials for lithium ion batteries (LIBs) via a facile vaporization−condensation−conversion strategy (VCC) with tobacco stem as the carbon precursor. The biomass-derived porous carbon not only acts as the host of red phosphorus to enhance the electrical conductivity , but also minimizes the volume expansion (≈400%) during cycling. The obtained P@BDPC composite with a high red phosphorus content (62.1 wt%) delivers a high specific capacity of 1689 mA h g −1 at 500 mA g −1 with an initial Coulombic efficiency (ICE) of 91.7% and superior rate capability of 599 mA h g −1 at 30 A g −1 . Furthermore, a high reversible capacity of 918 mA h g −1 can be retained over 600 cycles at 5 A g −1 , indicating a remarkable cycle stability. More importantly, the introduction of agriculture waste-tobacco stem contributes to building low-cost, high-performance anode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chunyan Luo,Haibo Che,Bingzhe Jia,Xinrui Qiang,Jiarui Li,Lei Wang,Jiale Wang,Yichi Liu,Zhiqiang Li,Xinming Wu
MXene all-solid-state supercapacitors show significant potential for various applications, however, the poor cycling stability under bending stresses restricts their feasibility in commercial use. To address this challenge, a flexible PLA/MXene electrode material with excellent cycling stability was prepared. Electrochemical testing revealed that the PLA/MXene electrode material exhibited a capacity retention of 96.3% after 10,000 cycles under 5 A/g current density. Furthermore, asymmetric all-solid-state supercapacitors, constructed with PLA/MXene film electrodes, retain 92.3% of their initial capacitance after 2,000 charge-discharge cycles at bending angles of 0°, 30°, 60°, and 90°, respectively. The significant improvement suggests that trace amounts of PLA can enhance the cycling stability of MXene electrodes compared to the 84.7% capacitance retention observed in MXene-based supercapacitors. This work provides a straightforward approach to fabricating future flexible wearable devices.
研究领域:
纳米材料科学
·
能源存储技术
·
柔性电子器件
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Xiaomeng Zhang,Xiaofeng Zhao,Buhe Bateer,Yanqing Jiao,Aiping Wu,Haijing Yan,Dongxu Wang,Jiaming Wang,Chungui Tian
High rate performance and cycling stability are crucial factors in the construction of electrode materials for supercapacitors. Herein, we designed and synthesized flower-like NiCoP assembled with nanosheets stabilized by carbon layers (NiCoP/C) through a ‘hydrothermal assembly-phosphating’ route. Nanolayers with rich pore channels can provide transport for a large number of ions (providing transport pathways for ions in the electrolyte, effectively reducing resistance during ion transport within the electrode), improve the specific surface area of electrode materials (increasing the contact area between the electrode and electrolyte, and thereby promoting charge transfer between the electrode and electrolyte), and enhance the structural stability. The conductivity of the 3D assembly NiCoP/C is high, similar to that of phosphides with enhanced mass/charge transfer, and it possesses good ability from the carbon coating and 3D structure to buffer any volume variation. These characteristics are favourable for application as electrode materials in supercapacitors. Under optimized conditions, the capacitance of the prepared NiCoP/C-2 is high (1261 F g−1 at a current density of 1 A g−1, 799 F g−1 at a current density of 10 A g−1) in a three-electrode system. The asymmetric supercapacitor assembled with NiCoP/C-2 as the positive material and N-doped porous carbon as the negative material exhibited excellent stability. After 8000 cycles, the discharge capacitance remained at 88.5%, presenting a high energy density of 40.06 W h kg−1 at 640 W kg−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
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Qin Hao,Houyi Ma,Zhicheng Ju,Guangda Li,Xiaowei Li,Liqiang Xu,Yitai Qian
LiCoO 2 nanoparticles were prepared through a sol–gel method, and then appropriate amount of CuO nanoparticles were deposited onto their surfaces to improve their cycling performances. It is found that the CuO coated sample has the capacity retention higher than 90% at the rates below 30 C after 10 cycles, which also has the highest capacities of 135 and 123 mAh g −1 at 40 C (5480 mA g −1 ) and 50 C (6850 mA g −1 ), respectively. The cyclic voltammograms result reveals that the CuO coating reduces the polarization and improves the electrochemical activity of cathode. In addition, experimental results indicate that CuO coating plays an important role in reducing the charge transfer resistance of the cell during cycling, which has been demonstrated by the electrochemistry impedance spectroscopy analysis. The above data indicate the potential application of CuO coated LiCoO 2 in high power field.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2018
·Vol. 8
·期 14
·1702805
·
IF 21.875
Ting He,Jianrui Feng,Yan Zhang,Lianhai Zu,Guichang Wang,Yan Yu,Jinhu Yang
Silicon is promising as a high energy anode for next-generation lithium-ion batteries. However, severe capacity fading upon cycling associated with huge volume change is still an obstacle for silicon toward practical applications. Herein, the authors report that Si-substituted Zn 2 (GeO 4 ) 0.8 (SiO 4 ) 0.2 nanowires can effectively suppress volume expansion effect, exhibiting high specific capacity (1274 mA h g −1 at 0.2 A g −1 after 700 cycles) and ultralong cycling stability (2000 cycles at 5 A g −1 with a capacity decay rate of 0.008% per cycle), which represents outstanding comprehensive performance. The superior performance is ascribed to the substitution of Si atom that imparts to the nanowires not only high reactivity and reversibility, but also the unique stress-relieved property upon lithiation which is further confirmed by detailed density-functional theory computation. This work provides a new guideline for designing high-performance Si-based materials toward practical energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 7
·2803-2812
·
IF 2.817
Pei Mengchun,Qi Zhiqiang,Wu Yuandong,Mei Dajiang,Wen Shaoguo
A copper-doped lithium-ion battery anode material Cu 0.5 Ni 0.5 Co 2 O 4 was obtained through simple hydrothermal synthesis and assisted by high-temperature calcination. Metal-organic framework was introduced into the precursor, and after calcination at 500°C, a porous nano-particle material with the specific surface area of 41.68 m 2 g −1 was obtained. With the assistance of metal-organic framework, the prepared material can effectively alleviate the volume expansion problem generated during the charge/discharge process and improve the electrochemical performance. More importantly, the Cu 0.5 Ni 0.5 Co 2 O 4 electrode material not only maintains good cycle stability but also has a high charge/discharge specific capacity. The material can remain 1347.93 mAh g −1 after 200 cycles at the current density of 1000 mA g −1 , and has a high discharge specific capacity of 1846.50 mAh g −1 in the first cycle at the current density of 1000 mA g −1 . Benefit from the structural features, the resultant Cu 0.5 Ni 0.5 Co 2 O 4 electrode material exhibits good electrochemical performance with remarkable specific capacities (1411.36–919.76 mAh g −1 ) at various current densities (50–1000 mA 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
Journal of Energy Storage
·
2024
·
IF 8.9
Xinyu Liu,Yao Wang,Zhenyu Wang,Shuya Zhao,Na Ju,Yiming Wang,Wenlong Zhang,Hongbin Sun
Sodium-ion batteries (SIBs) are anticipated to be a potentially more cost-effective alternative to lithium-ion batteries (LIBs) for large-scale energy storage. Carbon materials are practical anodes, but the traditional production of hard carbon for SIBs often requires high temperatures exceeding 1300 °C. Aiming for a more economical approach, this work presents a carbon material synthesized through the low-temperature carbonization of 2,3-diaminophenazine and terephthalic acid IPB-C (600). Despite its low specific surface area, this carbon material demonstrates exceptional capacity and cycling stability because of its interlayer warping feature. It delivers a specific capacity of 370 mAh g −1 at 300 mA g −1 and maintains 77.98 % capacity retention after 1500 cycles. This research highlights the potential for producing high-capacity carbon negative electrode materials with cost-effective bulk chemicals for SIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Metals
·
2020
·Vol. 10
·期 12
·1574
·
IF 2.117
Ruochen Shen,Chaohui Pu,Xiaoou Xu,Youpeng Xu,Zhilin Li,Zhu Wu
The research aims to study the effect of adding mischmetal (Mm) to the TiFe0.86Mn0.07Co0.07alloy on its hydrogen storage performance and cyclic stability. The results show that TiFe0.86Mn0.07Co0.07+ x% Mm (x = 0,4,6,8) alloys can be easily activated. The hydrogen absorption capacity of TiFe0.86Mn0.07Co0.07+ 4% Mm reaches 1.76 wt% (mass fraction) at 298 K. With the increase of Mm addition, the hydrogen storage capacity decreases slightly. Furthermore, after 40 absorption and desorption cycles in hydrogen containing 250 ppm O2, the alloy still has 36% of its initial hydrogen storage capacity, and the alloy can recover 93% of its hydrogen storage capacity through heat treatment.Keywords:TiFe hydrogen storage alloys;life test;impure hydrogen gas;cyclic stability
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials Express
·
2019
·Vol. 9
·期 8
·895-905
·
IF 1.465
Yu Juan,Huang Wenlong,Meng Bicheng,Wang Lejie,Zhao Junkai,Li Linbo,Du Xiaoqing,Fang Zhao
Sodium ions have been successfully doped into LiNi0.8Co0.1Mn0.1O2 (NCM811) by solid phase method. The influences of Na doping on the electrochemical properties of the electrode at high current intensities were studied. The experimental results
show that 3% Na modified LiNi0.8Co0.1Mn0.1O2 has superior rate performance and cycling behavior due to the cation mixing is suppressed and the structural stability is enhanced by Na doping. The capacity retention of Li0.97Na0.03Ni0.8Co0.1Mn0.1O2
is 64.33% after 100th cycles at 10 C (1 C = 200 mA · g–1) in the potential range from 2.8 V to 4.3 V, which is greatly higher than the pristine NCM (only 35.01%). Li0.97Na0.03Ni0.8Co0.1Mn0.1O2 also shows
excellent rate performance of 140.5 mAh · g–1 at 10 C, and the discharge capacity of 3% Na-NCM is higher than that of the pristine NCM when the current intensity is returned from 10 C to 0.5 C. The analysis of the cyclic voltammetry (CV) and electrochemical impedance
spectroscopy (EIS) measurements confirm that the Na doping plays an important role in inhibiting the electrochemical polarization of LiNi0.8Co0.1Mn0.1O2 and improving the diffusion of lithium ions.
研究领域:
材料科学
·
电化学
✓ 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）