ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Hao Chen,Li Xiao,Han Chen,Yirong Zhu,Kaixiong Xiang,Haiyang Liao
Residual Li on surface of spherical particles of LiNi 0·5 Co 0·2 Mn 0·3 O 2 (NCM523) was used to synthesise the core-shell structure of Li 3 PO 4 @ NCM523 for enhancing structural stability and long-cycle life. The optimal mass ratio (Li 3 PO 4 :NCM523) was found to be 0.5 wt% (LPO-0.5), and the thickness of Li 3 PO 4 on the surface of LPO-0.5 was approximately 12 nm. Compared with the pristine NCM523, the Li 3 PO 4 @ NCM523 cathode material not only has a longer cycle life, but also exhibits better structural stability. The Li 3 PO 4 layer inhibits the electrolyte from eroding the NCM523 cathode material and prevents the volume loss of the active microsphere during cycling. Furthermore, the core-shell structure of material observed via scanning electron microscopy was well maintained after 200 cycles. These results verify that the core-shell structure of material contributes to the improvement of Ni-based cathode structural stability and that the simple process favours the industrial application.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Junfeng Yang,Dongdong Li,Xusheng Wang,Xinxiang Zhang,Jian Xu,Jitao Chen
NASICON-structure Na 3 V 2 (PO 4 ) 3 (NVP) is a potential cathode for sodium ion battery , which however needs nano-crystallization to improve its rate performance. On the other hand, most practical electrodes are fabricated through slurry printing process, which needs to control the particle size to avoid the falling of the composite. Herein, for practical high-loading electrode fabrication, the micro-nano architecture, i.e. the micro particle plus nano channels inside, is suggested in this paper. The micro-nano information about NVP is obtained through Ga + focused ion beam-scanning electron microscopy to reconstruct the 3D model of a single NVP particle, fully exhibiting the continuous nano channels inside the micro sphere . The as-obtained NVP/C sample in the micro size exhibits remarkable enhanced rate performance of 106, 104, 101, 96, 89, 70 and 44 mAh g −1 at rates of 2, 5, 10, 20, 50, 100 and 200 C respectively, compared to the control sample in the nano size with the capacity of 106, 103, 85, 77 and 60 mAh g −1 at 2, 5, 10, 20 and 50 C respectively, meanwhile maintaining good adhesion towards Al foil and electrochemical performance at the areal loading of 10 mg cm −2 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2016
·Vol. 20
·期 8
·2331-2335
·
IF 2.327
Han Jin,Niu Yubin,Zhang Yan,Jiang Jian,Bao Shu-juan,Xu Maowen
Novel O3-type Na 0.8 Ni 0.6 Sb 0.4 O 2 is successfully fabricated via a solid-state method and further firstly used as cathode material for sodium-ion batteries (SIBs). The as-obtained material delivers a high capacity of ~107.3 mAh g −1 in the voltage range of 2–4.5 V with two discharge plateaus at 3.24 and 3.62 V, and exhibits a good capacity retention (98.5 mAh g −1 at the rate of 0.2 C after 100 cycles).
研究领域:
电化学
·
材料科学
·
能源存储
·
无机化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2013
·Vol. 17
·期 11
·2959-2965
·
IF 2.279
Li Qiang,Zhang Zhian,Zhang Kai,Xu Lei,Fang Jing,Lai Yanqing,Li Jie
Titania–sulfur (TiO 2 –S) composite cathode materials were synthesized for lithium–sulfur batteries. The composites were characterized and examined by X-ray diffraction, nitrogen adsorption/desorption measurements, scanning electron microscopy, and electrochemical methods, such as cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge–discharge tests. It is found that the mesoporous TiO 2 and sulfur particles are uniformly distributed in the composite after a melt-diffusion process. When evaluating the electrochemical properties of as-prepared TiO 2 –S composite as cathode materials in lithium–sulfur batteries, it exhibits much improved cyclical stability and high rate performance. The results showed that an initial discharge specific capacity of 1,460 mAh/g at 0.2 C and capacity retention ratio of 46.6 % over 100 cycles of composite cathode, which are higher than that of pristine sulfur. The improvements of electrochemical performances were due to the good dispersion of sulfur in the pores of TiO 2 particles and the excellent adsorbing effect on polysulfides of TiO 2 .
研究领域:
无机化学
·
能源材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 45
·期 2
·906-914
·
IF 3.288
Hong-bo Huang,Cai-ling Liu,Yue Yang,Shao-hua Luo
A series of lanthanum-doped Na3V2−xLax(PO4)3/C (0 ≤ x ≤ 0.03) composites have been fabricated via a simple sol–gel approach. The influences of La3+ substitution on the structure, morphology and electrochemical properties are systematically studied. Rietveld refinement is applied to explore the actual substitution site of La, which proves that La3+ ions successfully occupy the octahedral V sites. It is suggested that appropriate La doping will reduce the particle size and enhance the reversible capacity and rate capability. Among all the samples, the as-prepared Na3V1.99La0.01(PO4)3/C compound shows the highest electrochemical capability. It delivers a high initial specific capacity of 111.3 mA h g−1 at 0.2C and maintains a capacity of 108.1 mA h g−1 over 100 cycles, exhibiting much better electrochemical performance than the original Na3V2(PO4)3/C. In addition, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) experiments suggest that low-level La doping can greatly decrease the polarization and increase electrical conductivity with fast reaction kinetics and a higher Na+ diffusion coefficient. The study presented here will provide considerable insights into rare earth element-doping tactics, which will facilitate the commercialization of sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Haiming Li,Tailin Wang,Xue Wang,Guangda Li,Jianxing Shen,Jinling Chai
An Al-doped Na 2 FePO 4 F/mesoporous carbon nanonetwork derived from an metal–organic framework (MOF) material, was synthesized using a simple solid-state reaction method and evaluated as a promising cathode material for sodium-ion batteries. The MIL-53(Al) derived mesoporous carbon nanonetwork coating can enhance electron conductivity in Na 2 FePO 4 F cathode materials. The doping derived from MIL-53(Al) caused no damage to the crystal structure of the material, and Fe 2+ site was replaced by Al 3+ successfully. Therefore, the Al-doped Na 2 FePO 4 F/MOF-C composites exhibit substantial improvements in electrochemical performance in terms of rate capability and cycle performance. When current density increased from 0.1 C to 5 C, the specific capacity of Na 1.94 Fe 0.94 Al 0.06 PO 4 F/MOF-C only decreased from 115.2 mAh g −1 to 63.2 mAh g −1 ; thus, the composite presented outstanding rate capability. Moreover, an excellent capacity retention of 70.3% was maintained from the initial value of 70.4 mAh g −1 to 49.5 mAh g −1 after the 500th cycle at 5 C. This study provides insights into designing high-performance cathode materials by improving structural stability and the electrical conductivity induced by MOF-derived carbon coating and metal doping.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 4
Peng Hao,Liu Lin,Zhang Qiao,Liu Shuhao,Lin Man,Li Hao,Deng Yonghong,Jiao Chuanlai,Wang Chaoyang,Xu Hongli
High-voltage LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathodes are critical for enhancing the energy density of lithium-ion batteries (LIBs). The development of binders compatible with high-voltage NCM811 cathode materials is crucial to enhance the electrochemical performance of LIBs. However, the traditional fluoropolymer binder, poly(vinylidene difluoride) (PVDF), can potentially leach components or break down into poly(fluoroalkyl substances) (PFAS) chemicals, thereby contributing to PFAS contamination. A novel fluorine-free polymer, polysulfone-polyamide-polyimide (SPIO), was designed and synthesized as a binder for NCM811 cathodes. The SPIO binder exhibits exceptional mechanical properties and superior electrochemical characteristics. The cathode film fabricated with SPIO demonstrated a remarkable delamination force of 8 N (390 N·m −1 ), indicating robust adhesion. The Li∥NCM811 cell incorporating the SPIO binder retained 80% of its initial capacity after 300 cycles at a current density of 0.2 C. In comparison, the control cells assembled with the PVDF binder retained only 52% of their capacities under the same cycling conditions. Furthermore, the SPIO binder exhibited improved compatibility with the electrolyte. Transmission electron microscopy analysis of the cathode films after 100 cycles revealed the formation of a uniform, dense, and continuous chemical-electrochemical interface (CEI) by the SPIO binder on the surface of the NCM811 particles, which significantly contributed to the enhancement of the electrochemical performance. These results highlight the potential of SPIO as an advanced binder material for high-performance lithium-ion batteries.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 5
·1721-1729
·
IF 2.8
He Tao,Dai Junjie,Dong Yangtao,Zhu Fangshun,Wang Chao,Zhen Aigang,Cai Yurong
The increasing lithium-ion batteries (LIBs) market causes concerns about environmental issues and the mining of the earth’s metallic minerals. The harmless treatment of the spent LIBs and the effective recovery of scarce metal resources are gradually given high priority worldwide. In this article, p-toluenesulfonic acid-based deep eutectic solvents (DESs) are prepared to leach metal components from spent ternary LIBs. And the ternary LiNi 0.5 Co 0.2 Mn 0.3 O 2 material is regenerated through the co-precipitation method and high-temperature solid phase method. The results show that 97.96% of Li, 99.46% of Ni, 100% of Co, and 100% of Mn can be leached out again under the optimum conditions. The synthesized ternary material possesses an excellent reversible capacity (139.0 mAh·g −1 at 0.5 C) and an adequate long-cycle stability (123.6 mAh·g −1 after 100 cycles). This work provides an efficient and clean approach to recycling spent LIBs and has great potential application in the field of battery sustainability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ECS Electrochemistry Letters
·
2015
·Vol. 4
·期 3
·A29
·
IF 1.789
VanTu Nguyen,YueLi Liu,Xue Yang,Wen Chen
The precursor of Fe2(MoO4)3 has been synthesized by precipitation method, which is used to prepare high-capacity cathode material Fe2(MoO4)3/nanosilver composite for sodium-ion batteries. The silver modifying does not affect the monoclinic structure of Fe2(MoO4)3 but improves its kinetics in terms of discharge capacity and rate capability. AC impedance measurements show that the Ag modification decreases the charge transfer resistance of Fe2(MoO4)3/nanosilver composite cathodes. Electrochemical studies confirm that the Fe2(MoO4)3/nanosilver composite exhibits capacity of 90 mAhg−1, and retains 84.5 % of capacity even after 50 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
·
2017
·Vol. 38
·期 11
·1269-1274
·
IF 0.602
Liu Wenlong,Jiang Weiwei,Yan Chenran,Feng Wei,Wang Dongxia,Zhao Liming,Feng Tingting,Gong Feng
Li(Ni 0. 8 Co 0 . 15 Al 0 .05 )O 2 (NCA) cathode material for lithium ion batteries is synthesized by calcining Ni–Co–Al hydroxide or carbonate hydroxide hydrate precursor, which is obtained by hydrothermal method, and the NCA cathode material is hierarchical hollow microspheres with the diameter in the range of 3–5 µm and composed of nanoflakes and/or nanowires. The effect of hydrothermal reaction time on the morphologies and the crystalline quality of the NCA cathode material is investigated on the basis of scanning electron microscopy, X-ray diffraction, and tunneling electron microscopy. The NCA cathode material shows smooth and monotonous charge/discharge characteristics, delivers a reversible capacity as 144.4 mAh/g and retains 90.4% after 50 cycles at a current density of 0.1 C between 2.5 and 4.3 V.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 22
·3992
·
IF 4.329
Jinshan Mo,Dongmei Zhang,Mingzhe Sun,Lehao Liu,Weihao Hu,Bing Jiang,Lihua Chu,Meicheng Li
Nickel cobalt manganese ternary cathode materials are some of the most promising cathode materials in lithium-ion batteries, due to their high specific capacity, low cost, etc. However, they do have a few disadvantages, such as an unstable cycle performance and a poor rate performance. In this work, polyethylene oxide (PEO) with high ionic conductance and flexibility was utilized as a multifunctional binder to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2cathode materials. Scanning electron microscopy showed that the addition of PEO can greatly improve the adhesion of the electrode components and simultaneously enhance the integrity of the electrode. Thus, the PEO-based electrode (20 wt% PEO in PEO/PVDF) shows a high electronic conductivity of 19.8 S/cm, which is around 15,000 times that of the pristine PVDF-based electrode. Moreover, the PEO-based electrode exhibits better cycling stability and rate performance, i.e., the capacity increases from 131.1 mAh/g to 147.3 mAh/g at 2 C with 20 wt% PEO addition. Electrochemical impedance measurements further indicate that the addition of the PEO binder can reduce the electrode resistance and protect the LiNi0.6Co0.2Mn0.2O2cathode materials from the liquid electrolyte attack. This work offers a simple yet effective method to improve the cycling performance of the ternary cathode materials by adding an appropriate amount of PEO as a binder in the electrode fabrication process.Keywords:binder;ternary cathode material;lithium-ion battery;electrochemical performance
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2020
·Vol. 26
·期 4
·1617-1627
·
IF 2.394
Ren Xiaoying,Du Junlin,Pu Zhaohui,Wang Runbo,Gan Liao,Wu Zhu
High-temperature lithium battery system operated between 150 and 300 °C is highly desirable to be applied in oil/gas and geothermal explorations. However, the development of cathode material for high-temperature lithium batteries is relatively sluggish. In this study, LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) is coated with Li 2 MoO 4 by a facile solid-state reaction between MoO 3 and surface lithium residue and the resulting composite is applied in high-temperature lithium batteries as a novel cathode material. Such a strategy can not only remove lithium residue components, but also facilitate lithium-ion transport in NCM through the resulting Li 2 MoO 4 coating layer. At 200 °C, the discharge capacity and rate capacity of Li 2 MoO 4 coated NCM are dramatically improved compared to the pristine one. At 300 °C, the electrochemical performance of 4m-NCM is better than other samples, and each sample exhibits better electrochemical performances than it is at 200 °C due to the enhanced kinetics in high temperature.
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）