Behaviors of lithium ions around LiCoO2 positive electrode/LATP solid electrolyte interfaces by charging and discharging cycles

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-06-27 DOI:10.1016/j.nimb.2025.165786

R. Terasawa , B. Tsuchiya , K. Kataoka , T. Sasaki , N. Uno , H. Tsuchida

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引用次数: 0

Abstract

The behaviors of lithium ions (Li⁺) around LiCoO₂ positive electrode/LATP solid electrolyte interfaces were investigated under cycles with various charging and discharging rates using the elastic recoil detection (ERD) technique. It was found that the Li concentration, x, in Li_xCoO₂ reduced to approximately 0.25 by a fast charging rate of +1.56 mV/s. Subsequently, the value of x in Li_xCoO₂ returned to the initial state (x = 1.00) by a slow discharging rate of −0.31 mV/s, except for being higher (x = 1.3) at the Au/LiCoO₂ and Li_xCoO₂/LATP interfaces; while it was approximately 0.52 with the fast discharging rate of −1.56 mV/s. The big difference of x in Li_xCoO₂ by the slow and fast discharging rates may occur due to the Li accumulation rate at the LiCoO₂/LATP interface, resulting in Li⁺ ion diffusion to the negative electrode formed near the Pt/LATP interface.

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锂离子在LiCoO2正极/LATP固体电解质界面周围的充放电行为

采用弹性反冲检测（ERD）技术研究了LiCoO2正极/LATP固体电解质界面周围锂离子（Li+）在不同充放电速率循环下的行为。结果表明，在+1.56 mV/s的快速充电速率下，LixCoO2中的Li浓度x降至0.25左右。随后，LixCoO2中的x值通过−0.31 mV/s的慢放电速率恢复到初始状态（x = 1.00），除了Au/LiCoO2和LixCoO2/LATP界面处的x值更高（x = 1.3）；放电速率为- 1.56 mV/s时，放电系数约为0.52。由于LiCoO2/LATP界面处的Li积累速率不同，导致Li+离子向Pt/LATP界面附近形成的负极扩散，导致LixCoO2中x在慢速放电速率和快速放电速率下的较大差异。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.