IONICS
·
2022
·Vol. 28
·期 7
·3453-3460
·
IF 2.961
Chen Fuhua,Guo Hao,Zhao Lili,Chu Ying,Wang Xueying,Zhu Yongping
Traditional cathode materials can no longer meet the development needs of thermal batteries, and the research of new cathode materials is imminent. In this study, WS 2 was successfully prepared by a simple one-step synthesis method. X-ray photoelectron spectroscopy (XPS) showed that it has good electrical conductivity, its bandgap had been calculated by ultraviolet–visible diffuse reflectance spectroscopy (UV-visDRS), and its thermal decomposition temperature exceeded 1000 °C by thermogravimetric (TG) analysis. Due to the high decomposition temperature and high electronic conductivity of WS 2 , LiBr–LiCl–LiF electrolyte with high ionic conductivity but the high melting point was selected. The structure and composition of WS 2 and LiBr–LiCl–LiF after reaction at high temperature (500 °C) were studied, and WS 2 was found to have good compatibility with ternary lithium electrolyte. Assembling Li–B/LiBr–LiCl–LiF/WS 2 single thermal battery, the discharge specific capacity is 952As g −1 at 300 mA cm −2 and cutoff voltage of 0.97 V. And the internal resistance of the single thermal battery is 11.87 mΩ under the super large pulse current density of 5A cm −2 . This further advances the application of WS 2 in thermal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2019
·Vol. 17
·期 3
·1231-1240
·
IF 1.074
Zuolin Liu,Yongming Zhu,Peng Gao,Zhizhou Zhang
The mathematical model of lithium iron phosphate prepared by hydrothermal method was established by factor experimental design. The effect of individual variables and their interactions were studied by the main effects plot and Interaction plot. The influence of ascorbic acid dosage on the discharge specific capacity was greater than the hydrothermal time and the hydrothermal temperature, and the influence degree of the latter two was equivalent and the interaction effect of hydrothermal time and ascorbic acid dosage has the greatest influence on the discharge specific capacity in three interaction effects. The optimized hydrothermal condition was hydrothermal time of 9 hours, hydrothermal temperature of 210°C and ascorbic acid dosage of 1.5 mmol in the experimental design range, with the initial discharge specific capacity of 0.1 C as 152.5 mAh g −1 . The corresponding characterization was performed using electrochemical methods, XRD, SEM, and TEM. This study provided a protocol to factorially design better experiments to achieve excellent battery criterion in the context of lithium iron phosphate preparation.
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
·
2022
·
IF 8.907
Kai-da Zhu,Xin-ru Wang,Jing Zhong,Sen-lin Wang
Due to the expansion of the energy storage market, the demand for lead-acid batteries is also increasing. In order to improve the discharge specific capacity of lead-acid batteries, this paper uses graphene oxide (GO), Pb(Ac) 2 ·3H 2 O, urea and other raw materials in the reactor. The PbCO 3 /N-rGO nanocomposite was prepared by a hydrothermal method as a positive electrode additive for lead-acid batteries. The material was characterized by XRD, STM , SEM, Raman, etc., and was doped into a simulated battery positive plate. The positive plate exhibits excellent electrochemical performance when the addition amount of the PbCO 3 /N-rGO nanocomposite in the positive plate is 1 wt%. In the simulated battery test, the initial discharge specific capacity reaches 166 mAh g −1 , which is 52% higher than that of the blank control group, and a 2-fold improvement in HPRSoC cycle life at 1 C rate. The PbCO 3 /N-rGO enabled the battery to have a higher discharge specific capacity and the longest charge/discharge cycle life, this is due to the nanostructure and good electrical conductivity of the PbCO 3 /N-rGO nanocomposite improving the utilization of the positive active material (PAM).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Nan Wang,Linhao Sun,Xuecheng Cao,Jialin Fu,Shuo Qi,Lingling Tang,Dangsheng Xiong
Li–air batteries with ultrahigh energy density are attracting attention, but at present, their practical applications are severely limited by water intrusion in the air. Herein, we loaded PtCo alloy nanoparticles on a N-doped porous carbon surface to create a novel hydrophobic functional catalyst. This catalyst effectively inhibited water contamination and suppressed the occurrence of side reactions. Li–air batteries with hydrophobic functional catalysts exhibited over double the cycle performance in both humid oxygen (∼50% relative humidity, over 255 h) and ambient air (CO 2 : 700 ppm, ∼55% relative humidity, over 135 h) at a current density of 500 mA g -1 . In addition, the discharge specific capacities of humid oxygen and ambient air were increased to 18719.3 mAh g -1 and 11,385 mAh g -1 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2024
·
IF 9.6
Liang Xin,Zhao Dong-Qing,Huang Qian-Qian,Liang Sheng,Wang Li-Li,Hu Lei,Liu Ling-Li,Hu Kun-Hong,Deng Chong-Hai,Cheng Sheng,Zhu Er-Tao,Deng Hua-Xia
Lithium–sulfur battery is one of the most promising battery systems for industrialization due to its high theoretical specific capacity and high energy density. Nonetheless, the “shuttle effect” has restrained the advancement of lithium–sulfur batteries. In this work, a gradient-structured nanofiber membrane with pure gelatin on one side and Super P-MoO 2 /MoS 2 -gelatin on the other side was created using a multi-step electrostatic spinning technique, which was applied for multi-functional separator for lithium–sulfur batteries. The pure gelatin layer facing the anode side primarily homogenizes the lithium flux, whereas the Super P-MoO 2 /MoS 2 -gelatin layer facing the cathode side primarily adsorbs polysulfides by physical and chemical adsorption and enhancing polysulfide conversion efficiency. The findings demonstrate that even after 150 cycles at 0.2C, the lithium–sulfur battery can still sustain a discharge-specific capacity of 572.3 mAh·g −1 . When used with Li||Li symmetric batteries, it has a cycle life of more than 1200 h. The commercialization of lithium–sulfur batteries is given a fresh idea by this straightforward preparation technique. Graphical abstract
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Xiecheng Yang,Dantong Zhang,Lanqing Zhao,Chao Peng,Kun Ren,Changfan Xu,Pan Liu,Yingjie Zhou,Yong Lei,Bin Yang,Dongfeng Xue,Feng Liang
Rechargeable Na-CO 2 batteries are considered to be an effective way to address the energy crisis and greenhouse effect due to their dual functions of CO 2 fixation/utilization and energy storage. However, the insolubility and irreversibility of solid discharge products lead to poor discharge capacity and poor cycle performance. Herein, a novel strategy is proposed to enhance the electrochemical performance of hybrid Na-CO 2 batteries, using water-in-salt electrolyte (WiSE) to establish an optimal reaction environment, regulate the CO 2 reduction pathway, and ultimately convert the discharge product of the battery from Na 2 CO 3 to formic acid (HCOOH). This strategy effectively resolves the issue of poor reversibility, allowing the battery to exhibit excellent cycle performance (over 1200 cycles at 30 °C), especially under low-temperature conditions (2534 cycles at −20 °C). Furthermore, density functional theory (DFT) calculations and experiments indicate that by adjusting the relative concentration of H/O atoms at the electrolyte/catalyst interface, the CO 2 reduction pathway in the battery can be regulated, thus effectively enhancing CO 2 capture capability and consequently achieving an ultra-high discharge specific capacity of 148.1 mAh cm −2 . This work effectively promotes the practical application of hybrid Na-CO 2 batteries and shall provide a guidance for converting CO 2 into products with high-value-added chemicals.
研究领域:
能源存储
·
电化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 30
·期 2
·697-708
·
IF 2.8
Wang Guanzheng,Lei Huazhi,Wang Zheng,Yuan Zhentao,Zhan Zhaolin,Li Lu,Wang Xiao
Amorphous GeO 2 @C anode materials were successfully prepared from commercial GeO 2 and C 6 H 12 O 6 .H 2 O by a hydrothermal method combined with sintering under nitrogen atmosphere protection. The anode materials showed an ideal spherical shape of about 3 μm and their surface was uniformly covered with C. GeO 2 @C composite anodes exhibited better storage performance for Li-ion batteries. The discharge-specific capacities of GeO 2 @C-3 sample were 1143, 1049, 776, 551, and 308 mAh g -1 at current densities of 0.2, 0.5, 1, 2, and 5 A g -1 , and restored to 1136 mAh g -1 when the current density returned to 0.2 A g -1 . The reversible specific capacity was 756 mAhg -1 after 1000 cycles at a current density of 1 A g -1 . The GeO 2 @C anode was stable in the process of charge and discharge, and no obvious pulverization occurred. GeO 2 @C composites stabilized the electrochemical properties through carbon and amorphous structure to improve the overall electrical conductivity in Li + embedding/de-embedding processes.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Nan Wang,Jialin Fu,Xuecheng Cao,Lingling Tang,Xiankai Meng,Zhenyi Han,Linhao Sun,Shuo Qi,Dangsheng Xiong
Li–air batteries have received significant attention for their ultrahigh theoretical energy density. However, the byproducts induced by attacking air hinder the conversion of Li–O 2 batteries to Li–air batteries. Humidity is one of the main obstacles, not only causing side reactions with the discharge products but also leading to rapid corrosion of the lithium anode. Here, we fabricated a novel composite hydrophobic catalyst by loading RuO 2 and graphene on N-doped porous carbon. The catalyst was endowed with hydrophobicity and showed superior catalytic performance and low affinity to water in the air. A Li–air battery equipped with this novel composite catalyst exhibited eminent cycling performance in pure oxygen (over 470 h), humid oxygen [∼40% relative humidity (RH), over 310 h], and ambient air (∼42% RH, over 330 h) at a current density of 500 mA g −1 , and the discharge specific capacity increased from 13122.1 to 19358.6 mAh g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Shao-Lun Cui,Dan Feng,Zhen-Xue Xiao,Sheng Liu,Xue-Ping Gao,Guo-Ran Li
Ni-rich layered cathode materials are being paid much attention to because their high capacity can handily improve energy density of lithium-ion batteries. However, Ni-rich cathode materials still suffer from the deficiencies such as poor cycle stability, weak structural and thermal stability. In this work, Eu 2 O 3 -doped Li 4 SiO 4 with an enhanced ionic conductivity is proposed as surface coating layer for LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM) cathode material to improve the capacity retention and structural stability during cycling. The doping of Eu 2 O 3 in Li 4 SiO 4 makes the coating layer have higher ion conductivity and better stability than pure Li 4 SiO 4 layer. When the doping amount is 10 mol% of Li 4 SiO 4 , the corresponding cathode material NCM-LS3-0.10Eu 2 O 3 exhibits the optimal cycle and rate performance. The discharge specific capacity and capacity retention after 400 cycles at 1 C rate are 150.1 mAh g −1 and 80.48%, respectively. In particular, the NCM-LS3-0.10Eu 2 O 3 secondary particles avoid the appearance of serious cracks and maintain excellent structural stability even after long cycling. It is proved finally that the Eu 2 O 3 -doped Li 4 SiO 4 coating layer can not only inhibit the side reactions caused by the contact between electrode surface and electrolyte, but also reduce the resistance of lithium ion migration and suppress the microstructure changes caused by local stress.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ChemNanoMat
·
2023
·Vol. 9
·期 7
·e202300087
·
IF 3.8
Tingyi Wu,Huanglin Dou,Zhenxin Zhao,Junliang Zhou,Xiaomin Wang
Graphical The NiMoO 4 -modified separator can not only use its own strong polarity to chemisorption of polysulfides and effectively suppress the shuttle effect, but also can promote the mutual transformation between polysulfides of different phases, reduces the reaction potential barrier, and the redox kinetics is significantly improved. Besides, the hollow microsphere structure facilitates the penetration of electrolyte and establishes a pathway for ion/electron transport, which accelerates the Li + diffusion rate. Lithium-sulfur (Li−S) batteries are considered to be the most promising candidates for achieving low-cost, high-energy density systems. The serious shuttle effect of polysulfides (LiPS) and the sluggish redox kinetics have become major obstacles to the practical application of Li−S batteries. Herein, a hollow microsphere structure of transition bimetallic oxide nickel molybdate (NiMoO 4 ) was prepared by hydrothermal reaction and calcination method. It was used as a separator coating material to inhibit LiPS shuttle and promote efficient redox conversion of sulfur species. The hollow microsphere structure not only possesses a large internal space to physically confine LiPS but also exposes abundant active sites to enhance the redox kinetics of LiPS. The NiMoO 4 shows superior adsorption ability for LiPS and accelerated ion/electron transport rates compared to NiO, thus facilitating the anchoring-conversion-diffusion processes of polysulfides. Benefiting from this versatility, the Li−S batteries with NiMoO 4 -PP exhibit a high discharge specific capacity of 1354.5 mAh g −1 at 0.1 C. In addition, the battery exhibits excellent cycling stability with a capacity decay rate of 0.027% for 500 cycles at 2 C. These results demonstrate the potential application of NiMoO 4 -based electrocatalysts in high-performance Li−S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 20
·7607-7612
·
IF 8.307
Yue Niu,Wenqiang Xu,Yingjie Ma,Yang Gao,Xianglong Li,Lidong Li,Linjie Zhi
Aqueous zinc ion batteries (AZIBs) hold great potential in large scale, low-cost energy storage. Unfortunately, their development is limited by the poor performing cathode materials due to their unstable structures and low capacities. Hence, we develop novel layer-by-layer stacked vanadium nitride nanocrystals/N-doped carbon hybrid nanosheets (VN/NC) as cathode materials by in situ thermal conversion of pyrolyzing pentyl viologen intercalated V2O5. The combination of a leaf-like morphology, the nano structure of vanadium nitride crystals and the conductive porous nitrogen-doped carbon nanosheets endow the VN/NC cathode with excellent electrochemical performance in AZIBs. Thus, it delivers a high discharge specific capacity of 566 mA h g−1 at a current density of 0.2 A g−1 and a superior rate capability. Most importantly, it exhibits a remarkable cyclic stability with capacity retention of 131 mA h g−1 (85% of the initial capacity) after 1000 cycles at a current density of 10 A g−1. The design of the unique VN/NC hybrid nano sheets offers a pathway towards developing high performance electrode materials for energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Shiwei Yu,Houliang Sun,Zaka Ullah,Ledi Chen,Xiaowei An,Mingliang Chen,Shoupu Zhu,Liwei Liu,Qi Li
High-performance optoelectronic bifunctional cathode materials may simultaneously seize and store solar energy in lithium-ion batteries to boost their storage capacity. However, such photoactive cathodes with typical intrinsic features are generally limited for UV light applications and offer poor sunlight harvesting which results in lower energy density. Here, the assembly of two oligomers, poly(vat blue 6) (PVB6) and poly(vat blue 6 sulfide) (PVB6S) is reported, through polymerization to extend the conjugated structure of organic optoelectronic small molecules. These oligomers are effectively employed as photo-assisted bifunctional cathodes for lithium-ion batteries. The extended conjugated structure narrows the energy gap, promoting exciton dissociation and expanding the light absorption region. PVB6S possesses a narrow energy gap of 1.565 eV, and the discharge-specific capacity of the battery with PVB6S is enhanced from 203 to 411 mAh g −1 under light illumination, which is approximately twice the original capacity. This demonstrates the extended conjugated structure and charge separation in a cell, which synergistically contributes to the rational design of photo-assisted bifunctional cathode materials and complementary enhances the performance of lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
光电学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）