CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 22
·44983-44992
·
IF 5.1
Shuai Zhao,Hai-lin Ren,Yang Su,Cheng-wei Li,Xiao-min Wang
High-nickel layered cathode materials for lithium-ion batteries have received widespread attention in new energy vehicles for their excellent specific energy and cost advantages, and are considered to be the most promising cathode materials for high-energy density lithium-ion batteries. Despite its many advantages, poor thermal stability and rapid capacity degradation have greatly limited its large-scale application. Ion doping is considered to be an effective way to improve its drawbacks, and in this paper, a series of W-doped LiNi 0.9 Co 0.1 O 2 cathode materials were prepared using WO 3 as a tungsten source. Among them, 1 mol% W doping was the most effective, and its reversible capacity of 204.44 mA g −1 still had 93.25 % capacity retention after 100 this cycles at 1C. Combined with DFT calculations , it is found that the introduction of W does not change the original layered structure and the material transitions from semi-metallic to metallic at lower doping concentrations, resulting in more electrons occupying the Fermi energy levels to enhance its electrical conductivity and leading to an elevated spin state and a lower oxidation state of Ni.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态化学
·
计算材料学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xinhe Yang,Zicheng Zuo,Haiyan Wang,Quanbin Chen,Hui Zhang,Zhenlei Huang,Borong Wu,Henghui Zhou
A one-step synthesis method is developed to prepare the Li[Ni 0.5 Co 0.2 Mn 0.3 ]O 2 (NCM 523) cathode with uniform tungsten-coating layer for lithium-ion battery . Such modified material shows similar properties with the bare NCM 523 in terms of the primary particles, secondary structure , and specific capacity. With W coating layer , the NCM 523 gives remarkable improvement in the long-term capacity retention in the half-cell testing, which is sharply inconsistent with the result from the full-battery tests, indicating a contradiction between the half-cell and full-battery tests in some case. After further investigations, such conflict between the half-cell and full-cell tests in evaluating the W-coating strategy is attributed to the dissolution of Li 2 WO 4 layer in the electrolyte, which probably destroys the solid electrolyte interface (SEI) on the graphite anode and irreversibly consumes the active lithium ions for renovating SEI in full-cell testing. These results will benefit researchers in the area of lithium-ion batteries to fully understand the differences between the half-cell and full-cell testing, and develop the effective strategies for cathode modifications.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
表面改性
·
固态离子学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Kuan Wu,Gang Xu,Dengyu Pan,Minghong Wu
Combination of high-capacity and flexibility in electrode materials is crucial for flexible electronics. Recently, red phosphorus (P) has caused increasing focus as a hopeful storage material for lithium storage due to its super-high theoretical capacity and low cost. However, the low conductivity of red P and its large volume change during cycling process lead to reduced electrochemical activity. So far, no effective methods have been developed to construct flexible binder-free electrodes using red P as an active material for high-performance lithium-ion batteries (LIBs). Here, a novel hollow three‐dimensional (3D) internet structure as a flexible high-areal-capacity electrode material was fabricated by confining red P nanoparticles into compact MOF-derived carbon-based composite polyhedrons/carbon nanotube internets. The electrode manifests an excellent lithium storage performance for LIBs with a high discharge capacity of 4.78 mAh cm −2 (1920 mAh g −1 ) at 0.1 mA cm −2 and a good capacity retention of 79.2% at 1 mA cm −2 after 300 cycles (73% and 69% capacity retention at 5 and 10 mA cm −2 after 500 cycles, respectively). The novel flexible anode materials can provide excellent Li + storage performance for flexible electronics applications.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
·
先进电池技术
✓ 已验证
DOI
高影响因子
Progress in Natural Science-Materials International
·
2019
·Vol. 29
·期 3
·310-315
·
IF 3.31
Chao Hou,Ke Yang,Fawei Tang,Haibin Wang,Xuemei Liu,Xiaoyan Song
A micro-nano combined composite with Li-Si alloy nano-domains in three-dimensional carbon network was prepared as a novel electrode material. The carbon network constrained the volume contraction and promoted effectively charge transfer of the whole active material. Meanwhile, the abundant interfaces between Li-Si alloy and carbon bound by Li-C ionic bonds, not only enhanced the delithiation at interface but also ensured the structural integrity. The present composite exhibited excellent electrochemical performance. The specific capacity at the first lithiation was as high as 1133 mAh g −1 at a current density of 0.1 A g −1 , which is superior to those reported for the core-shell structured nanoparticles. The Coulombic Efficiency at the first cycle was 90.4% and kept stable at more than 99.0% after only 10 cycles. The capacity retention was nearly twice as that of the incompact mixture of Li-Si nanoparticles and carbon. The energy density of the full cell constructed by the present composite and sulfur was evaluated to be 3 times as high as that of the commercial lithium-ion batteries. This work provides a new universal strategy for developing Li-rich anode materials with high combination properties and low cost.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固态物理
✓ 已验证
DOI
高影响因子
Energy Technology
·
2022
·Vol. 11
·期 11
·2200376
·
IF 4.149
Peng Xu,Decheng Zhao,Shupei Liu,Jinghui Ren,Jian Zhou,Ning Wang,Zhoulu Wang,Xiang Liu,Yutong Wu,Yi Zhang
Selenium cathodes are expected to become next-generation energy storage materials due to their high electronic conductivity and volumetric capacity. However, their commercial applications are hindered by polyselenides dissolution and low Se utilization. Herein, a biomass compound, namely lychee seed, is used as a sustainable precursor to design hierarchically porous carbon by a single-step carbonization activation method. With a unique hierarchical porous structure, the lychee seed–derived activated carbon (LSDAC) used to encapsulate selenium delivers a reversible capacity of 446 mA h g −1 at 2 C and 291 mA h g −1 at 5 C after 1000 cycles. The Se/LSDAC electrodes show the most favorable fast-charging and good cycling behavior compared to the previously reported biomass-based carbon materials. By increasing the Se area loading to 9.5 mg cm −2 , the Se/LSDAC cathode maintains an areal capacity of 3.7 mA h cm −2 (3.2 mA cm −2 areal current density) after 80 cycles. High Se loading and economical and fast-charging cathode designs in Li–Se batteries are inspired.
研究领域:
电化学储能
·
材料科学
·
纳米能源材料
·
可持续能源技术
·
先进电池技术
✓ 已验证
DOI
高影响因子
Journal of Power Sources Advances
·
2020
·
IF 0
Qiuhong Wang,Walid A. Daoud
Flow battery is a promising energy storage technology for facilitating utilization of renewable resources. While new types of flow batteries have been explored toward high energy density, hampering the power density due to high electrolyte viscosity and sluggish reaction kinetics. Discovery of an aqueous electrolyte with multi-electron transfer reaction is thus favorable for both high energy and power densities due to its multiple charge stored at the same concentration. Both criteria are crucial to improve the flexibility of cell design and widen the application potential. Herein, bismuth is pioneered as negative electrolyte (negolyte) for hybrid flow battery owing to its three-electron reaction and the significantly increased solubility in methanesulfonic acid. In conjunction with cerium electrolyte, a volumetric energy density of 90 Wh L −1 is achieved and simultaneously a high power density of 295 mW cm −2 at 90% state-of-charge is demonstrated using low-cost carbon electrode. Furthermore, a high volumetric capacity of 120 Ah L −1 is reached via adopting graphite felt, which is 100% of the theoretical specific capacity of 1.5 M bismuth negolyte.
研究领域:
电化学储能
·
能源材料
·
功能材料
·
应用电化学
·
可再生能源存储
✓ 已验证
DOI
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2015
·
IF 2.729
Shuang Xia,Xiao-Min Zhang,Kuan Huang,Yong-Le Chen,You-Ting Wu
Physical and electrochemical characteristics of aluminium secondary battery systems based on aluminium anodes, sulfur–carbon cathodes and ionic liquid electrolytes were investigated. Aluminium chloride (AlCl 3 )/triethylamine hydrochloride (Et 3 NHCl) ionic liquids were used as the electrolytes. Toluene, benzene, dichloromethane (DCM), and 1,2-dichlorethane (DCE) were tested as the additives to modify the performance of ionic liquid electrolytes. DCM and DCE were found to be the better choices, with 0.2 as the optimized volume ratio of organic solvent to ionic liquid. The additives have functions of reducing the viscosities and elevating the conductivities of ionic liquid electrolytes, while having little influence on the thermal stability of battery system in normal working temperature range. To assess the electrochemical properties of the electrolytes, galvanostatic charge/discharge studies were performed at the cell voltage of 2.4 V to 0.6 V at a constant current discharge of 15 mA/g. The cell exhibits well-defined discharge voltage plateaus near 1.8 V. A discharging capacity of 113.64 mAh/g at the first cycle is obtained for the cell based on DCM-ionic liquid electrolyte, in comparison with 85.23 mAh/g for the cell based on pure IL. The discharging capacity has the highest value of 131.67 mAh/g, and remains 104.69 mAh/g after 40 cycles. This study indicates that the performance of aluminium secondary battery can be greatly improved by adding a small volume of organic additives to the ionic liquid electrolytes.
研究领域:
电化学
·
能源材料
·
电池技术
·
物理化学
·
功能材料
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2012
·Vol. 24
·期 24
·3201-3204
·
IF 13.877
Shaohua Liu,Haiping Jia,Lu Han,Jiulin Wang,Pengfei Gao,Dongdong Xu,Jun Yang,Shunai Che
Graphical Hierarchical porous TiO 2 –B with thin nanosheets is successfully synthesized. TiO 2 –B polymorph ensures fast insertion of Li-ion due to its pseudocapacitive mechanism. The thin nanosheet walls with porous structure allow exposure to electrolytes for facile ionic transport and interfacial reaction. The joint advantages endow this material with high reversible capacity, excellent cycling performance, and superior rate capability.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机非金属材料
·
电极材料
·
锂离子电池
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Fei Xu,Hongtao Wang,Mengyi Wu,Jiangsai Nan,Ting Li,Shun-an Cao
Redox-active organic materials are potential cathode materials for material-sustainable and environment-friendly Li-ion batteries. As is one of the most prominent features for organic compounds, isomerism has a significant influence on their properties. Herein, we synthesize two isomeric pairs of poly(anthraquinonyl imide)s ( PAQI s) by a simple one-pot reaction, and investigate their electrochemical properties as Li-ion battery cathodes by cyclic voltammogram and galvanostatic discharge/charge cycling. The PAQI materials exhibit a high reversible capacity of 202 mAh g −1 and a stable cyclability with 80% capacity retention over 200 cycles, and a remarkable rate performance, suggesting a potential feasibility of these organic cathode materials for high-capacity Li-ion batteries. The discharge/charge potentials of these PAQI s are slightly lower than the monomers . A further comparison of these four PAQI s indicates the isomerism plays a significant role in the electrochemical performance of these organic electrode materials .
研究领域:
电化学
·
材料科学
·
能源存储
·
有机电极材料
·
锂离子电池
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Xin Wu,Xingyu Xiong,Bin Yuan,Jun Liu,Renzong Hu
A good cycling stability is a prerequisite for the application of metal-based materials in lithium-ion batteries (LIBs). However, an abnormal increase in capacity is often observed, which has rarely been focused on in many studies. In our SnSe-Mo-C composite anode, a high reversible capacity of 737.4 mAh g −1 remained after 5000 cycles at 5 A g −1 between 0.01 and 3.0 V versus Li/Li + . However, a continuous capacity increase occurred in the initial cycles, with 1086.9 mAh g −1 after 1000 cycles and 1216.9 mAh g −1 after 1500 cycles, respectively. Further studies revealed that the electrolyte decomposed at high potentials (2.5–3.0 V) and provided additional capacities. The cut-off voltage and electrolyte filling were controlled, which eliminated the impact of electrolyte decomposition, prevented rapid capacity decay, and provided a stable cycling performance for SnSe-Mo-C anodes in LIBs. This work shows that the composite anode is promising for lithium storage and the findings provide new insights into understanding and controlling the phenomenon of capacity increase with cycling in metal-based anode materials.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Jing Zhou,Dapeng Li,Shutong Chen,Yao Xu,Xue Geng,Chaoran Guo,Yong Huang
The immobilization of sedimentary phosphorus (P) by capping sediments with amended calcium peroxide material (ACPM) and CaO 2 was investigated, the sediments and overlying water from a black-odor river. Under the capping with ACPM and CaO 2 , the pH and dissolved oxygen (DO) in the overlying water were higher than in the control. This contributed to the more loss of external P under the ACPM (the phosphate sorption was fitted well by the Langmuir equation, the maximum P sorption capacity up to 29.28 mg P g −1 ). Additionally, ACPM improves the decrease of the reduction materials (e.g., NH 4 + -N, Fe 2+ ) in the pore water compared to that associated with CaO 2 , resulting in a less obvious dissolved inorganic P (DIP) in the pore water, but the accumulation of DIP in the pore water with CaO 2 suggested an explosive release once the micro-environment conditions encounters adverse conditions. The sharp reduction of Fe/Al-P and Res-P contributes to the increase of DIP in the pore water, with a release of up to 390.60 mg P kg −1 DW (dry weight), whereas the value is only 62.55 mg P kg −1 DW when capped with ACPM. Correspondingly, the percentage of the bioavailable P to Tot-P decreases rapidly from 17.27% (control, 0–2 cm) to 7.21% (ACPM, 0–2 cm) and 10.57% (CaO 2 , 0–2 cm), indicating the obvious P immobilization. The implication is that the application of CaO 2 is not suitable for direct use, while the combination with other materials (e.g., WPS) is a better choice.
研究领域:
环境科学
·
水体修复
·
环境化学
·
污染控制
·
沉积物管理
✓ 已验证
DOI
高影响因子
DESALINATION
·
2023
·
IF 9.9
Xudong Bu,Yurong Zhang,Haiqing Guo,Sheng Wang,Xueyan Du
The ion removal capacity of carbon based capacitive deionization (CDI) is limited by the double-layer mechanism. Replacing one electrode of the conventional carbon-based symmetric CDI with a battery-like ion insertion material to obtain hybrid capacitive deionization (HCDI) can significantly improve the adsorption capacity . Various ion insertion materials have been adopted for HCDI, however, how to optimize the performance of the HCDI system by matching the two electrodes with different ions removal mechanism remains challenging. In this work, a HCDI desalination cell was demonstrated by using NaTi 2 (PO 4 ) 3 /reduced graphene oxide composites (NTP-rGO-700) as the cathode and activated carbon (AC) as the anode. Based on the mass balance strategy of electrodes and the electrochemical behavior of hybrid capacitors with different AC:NTP-rGO-700 mass ratios, the HCDI desalination cell was assembled with the optimal AC:NTP-rGO-700 mass ratio of 2:1. At an operating voltage of 1.6 V and a current density of 125 mA·g −1 , the specific adsorption capacity (SAC) of the HCDI cell can reach 51 mg·g −1 with an average salt adsorption rate (ASAR) of 2 mg·g −1 ·min −1 , and the energy consumption (E m ) is 136.53 kJ·mol −1 . This work provides an efficient approach for developing high performance HCDI cell.
研究领域:
环境科学
·
电化学
·
材料科学
·
水处理技术
·
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）