JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Wei Feng,Huirong Liu,Mingliang Zhao,Jianling Li,Feiyu Kang
The poly(ethylene oxide) based composite solid electrolyte(PEO-CSE) is an effective solution for developing high-performance solid-state lithium battery . However, the poly(ethlene oxide)(PEO) based solid-state lithium battery using 4.0 V cathode suffers from severe interfacial instability problems. In this work, we add additive lithium difluorophosphate(LiPO 2 F 2 ) into the PEO-CSE to form a stable and low resistance interphase at the cathode/electrolyte interface during charge/discharge process. The electrochemical stability window of PEO-CSE increases to ∼5.0 V. Besides, the electrochemical performance of PEO based solid-state lithium battery with LiCoO 2 as cathode is excellent. The discharge capacity of LiCoO 2 /Li cell with LiPO 2 F 2 reaches 108.5 mAh g −1 at 1.0C. In contrast, the discharge capacity that without LiPO 2 F 2 is only 60.0 mAh g −1 . Meanwhile, the PEO-CSE with LiPO 2 F 2 cell delivers stable cycle performance at 4.2 V. The capacity retention maintains 88.5% compared with 16.1%(without LiPO 2 F 2 ) after 100 cycles. Furthermore, it's still maintains 83.3% after 150 cycles. In addition, the cathode/electrolyte interface is analyzed by transmission electron microscope(TEM) and X-ray photoelectron spectroscopy(XPS). Galvanostatic intermittent titration test(GITT) is used to analyze the dynamic diffusion performance. This strategy provides a simple and effective way to improve the high voltage stability of the cathode/electrolyte interface.
研究领域:
电化学
·
材料科学
·
能源存储
·
固态电池
·
界面工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Shuya Wang,Yaxin Chen,Bin Cui,Bo Li,Shuxuan Wang,Yanhua Cui,Zhicheng Ju,Quanchao Zhuang
Computer simulation accelerates the selection and application of new electrode materials. The First-principles calculations based on density functional theory (DFT) are performed to evaluate the performance as cathode for Potassium ion batteries (PIBs) on the structure, electronic conductivity and ionic diffusion of O-doped KMnF 3 . After taking comprehensive consideration of the calculation results, the nanostructured O-doped KMnF 3 was synthesized and the structure and electrochemical properties were further improved by carbon coating. Here, we report a new etch pathway to create a new class of carbon-coated perovskite fluoride to improve the performance of PIB in terms of rate capability and cycle stability. These new material design concepts will help discover and synthesize new materials for PIBs.
研究领域:
材料科学
·
电化学
·
计算材料学
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能源存储
·
无机化学
·
纳米材料
·
固体物理
✓ 已验证
DOI
高影响因子
Small Methods
·
2021
·Vol. 5
·期 9
·2100544
·
IF 14.188
James Kumankuma-Sarpong,Wei Guo,Yongzhu Fu
The development of metal ion-intercalated active materials for excellent electrochemical performance in rechargeable aqueous zinc-ion batteries (AZIBs) is challenging. The structure instability and intrinsic electrostatic repulsion of the lattice framework cause structural breakdown and low-rate performance. In response to these problems, yttrium vanadium oxide–poly(3,4-ethylenedioxythiophene) (PEDOT@YVO) composite is reported as stable cathode material for AZIBs. The introduction of PEDOT in YVO nanorods improves the crystalline structure with an enlarged interplanar lattice spacing of 3.4 Å. The PEDOT@YVO composite electrode demonstrates effective electric conductivity and a higher initial specific capacity of 308.5 mAh g −1 than that (125.5 mAh g −1 ) of the pure YVO at 0.2 C rate. It also features a long-term stable discharge–charge cycle performance of 4000 cycles with a capacity retention of 79.2% at 1C rate, better than YVO (29.4 mAh g −1 ). The oxygen vacancies and improved electrical conductivity of the composite account for the invigorated electrochemical performance. Consequently, this work reveals another avenue for constructing unique electrodes to enhance the electrochemical properties of AZIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 39
·2302691
·
IF 13.3
Jing Yu,Guodong Zhou,Yueqing Li,Yuhao Wang,Dengjie Chen,Francesco Ciucci
Composite polymer-ceramic electrolytes have shown considerable potential for high-energy-density Li-metal batteries as they combine the benefits of both polymers and ceramics. However, low ionic conductivity and poor contact with electrodes limit their practical usage. In this study, a highly conductive and stable composite electrolyte with a high ceramic loading is developed for high-energy-density Li-metal batteries. The electrolyte, produced through in situ polymerization and composed of a polymer called poly-1,3-dioxolane in a poly(vinylidene fluoride)/ceramic matrix, exhibits excellent room-temperature ionic conductivity of 1.2 mS cm −1 and high stability with Li metal over 1500 h. When tested in a Li|electrolyte|LiFePO 4 battery, the electrolyte delivers excellent cycling performance and rate capability at room temperature, with a discharge capacity of 137 mAh g −1 over 500 cycles at 1 C. Furthermore, the electrolyte not only exhibits a high Li + transference number of 0.76 but also significantly lowers contact resistance (from 157.8 to 2.1 Ω) relative to electrodes. When used in a battery with a high-voltage LiNi 0.8 Mn 0.1 Co 0.1 O 2 cathode, a discharge capacity of 140 mAh g −1 is achieved. These results show the potential of composite polymer-ceramic electrolytes in room-temperature solid-state Li-metal batteries and provide a strategy for designing highly conductive polymer-in-ceramic electrolytes with electrode-compatible interfaces.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
高分子化学
·
无机非金属材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Zhengwu Wang,Yannan Zhang,Bao Zhang,Dong Yang,Kai Zhou,Yixue Huang,Fei Wang,Jianguo Duan,Xianshu Wang,Peng Dong,Yingjie Zhang
Spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) has gained significant attention as a promising cathode material for lithium-ion batteries due to its high working voltage (>4.7 V) and energy density . However, challenges such as electrolyte decomposition-induced material interface erosion and transition metal dissolution under high operating voltage hinder its commercial use. In this study, a thin and uniform Sm 2 O 3 layer has been successfully deposited on the surface of LNMO using a wet chemical method . A comprehensive investigation of surface morphology , crystal structure, and electrochemical performance of the modified LNMO is conducted. The results demonstrate that the Sm 2 O 3 surface modification acts as a robust multifunctional protective layer, effectively shielding against hydrofluoric acid-induced chemical attack and enhancing the migration efficiency of lithium ions . Notably, the capacity retention rate of LNMO@Sm 2 O 3 (3 wt%) remains up to 88 % after 280 cycles, significantly surpassing the uncoated counterpart. The coated material exhibits a capacity of 114 mAh g −1 even under 10 C rate conditions. Moreover, the AC impedance values and manganese dissolution of the modified material in the organic electrolyte are considerably lower than those of the uncoated counterpart. Theoretical calculations strongly support the experimental findings, revealing higher Mn vacancy formation energy and density of states at the Fermi energy level for the Sm 2 O 3 -modified electrodes. This research contributes to the field of surface modification and paves the way for further enhancements in the electrochemical performance of other high-voltage manganese-based lithium-ion batteries (LIBs).
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米技术
·
表面工程
·
锂电池
✓ 已验证
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2025
·Vol. 35
·期 7
·2341-2353
·
IF 4.7
Han-zhou LIU,Yan-chen LIU,Sheng-hao JING,Ya-qi HU,Zong-liang ZHANG,Si-liang LIU,Yang LIU,Zhi ZHUANG,Fan-qun LI,Fang-yang LIU
A dual-halide solid electrolyte, Li 3 YCl 3 Br 3 , was synthesized using a wet-chemistry route instead of the conventional mechanical ball-milling route. Li 3 YCl 3 B r3 exhibits an ion conductivity of 2.08 mS/cm and an electro- chemical stability window of 3.8 V. Additionally, an all-solid-state lithium-ion battery using Li 3 YCl 3 Br 3 and LiNi 0.83 Co 0.11 Mn 0.06 O 2 (NCM811) as the cathode material achieves a capacity retention of 93% after 200 cycles at 0.3 C and maintains a specific capacity of 115 mA·h/g during 2 C cycling. This exceptional performance is attributed to the high oxidative stability of Li 3 YCl 3 Br 3 and the in-situ formation of Y 2 O 3 inert protective layer on the NCM811 surface under high voltage. Consequently, the study demonstrates the feasibility of a simple, cost-effective wet-chemistry route for synthesizing multi-component halides, highlighting its potential for large-scale production of halide solid electrolytes for practical applications.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
电池技术
·
无机非金属材料
·
纳米材料应用
✓ 已验证
DOI
高影响因子
Energy Technology
·
2019
·Vol. 7
·期 4
·1800981
·
IF 3.163
Bangwei Deng,Hao Wang,Xiang Li,Yan Ding,Daming Sun,Jun Ma,Mianzhong Chen,Tao Chen,Feng Gao,Meizhen Qu,Gongchang Peng
Tris(trimethylsilyl)phosphite (TMSPi) has been reported to be an excellent electrolyte additive. However, scarce reports exist on the effect of the charge cutoff potential on the cyclic stability using high-performance LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622)–mesocarbon microbead (MCMB) full cells. Herein, a high-loading and repeatable NCM622–MCMB coin-type full cell is successfully prepared, and the role of TMSPi on such a full cell at charge cutoff potentials of 4.25 and 4.45 V is studied. Theoretical calculations and detailed analyses reveal that it is oxidized in the first charging process due to its unsaturated P—O bonds, thus forming a stable P—O—F-rich cathode electrolyte interphase and preventing severe decomposition of the electrolyte over NCM622 during long-term cycling. In addition, the P—O and Si—O bonds of TMSPi both display HF-scavenging ability. Moreover, TMSPi may react directly with the LiPF 6 -based electrolyte to form some intermediate products that can be reduced on the MCMB electrode, thereby modifying the solid electrolyte interphase and improving the stability of MCMB during lithium intercalation.
研究领域:
电化学
·
材料科学
·
能源存储
·
锂离子电池
·
界面化学
·
电极材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）