| 杨盼盼,李凯*,冯捷敏,李大伟,张俊乾.锂离子薄膜电极充放电变形的原位实验观测方法[J].实验力学,2018,33(5):716~724 |
| 锂离子薄膜电极充放电变形的原位实验观测方法 |
| On the in-situ experimental observation method of lithium-ion thin film electrode deformation in charge-discharge process |
| 投稿时间：2018-01-07 修订日期：2018-02-10 |
| DOI：10.7520/1001-4888-18-007 |
| 中文关键词: 锂离子薄膜电极 锂离子电池 充放电 变形 相移电子散斑干涉 |
| 英文关键词:Lithium-ion thin film electrode Lithium-ion battery Charge-discharge deformation Phase-shifting ESPI (electronic speckle pattern interferometry) |
| 基金项目:国家自然科学基金(11332005)资助，上海市自然科学基金(17ZR1410700)资助 |
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| 中文摘要: |
| 锂离子薄膜电极在充放电过程中的力学变形会严重影响锂离子电池的性能和使用寿命。本文提出一种原位观测锂离子薄膜电极充放电变形的实验方法,该方法通过设计一种新型的实验室模型电池，并采用基于位相增量叠加的相移电子散斑干涉方法测量变形，成功实现了对锂离子薄膜电极充放电变形的原位实验观测。实验结果表明，锂离子薄膜电极在充放电过程中会产生周期性的变形，该变形宏观上与电池的SOC(State of Charge，充电状态)相关，微观上则与锂离子在电极活性材料中的嵌入/脱出过程对应。该实验方法为深入研究锂离子薄膜电极变形对锂离子电池性能的影响提供了一种有力的实验手段。 |
| 英文摘要: |
| The mechanical deformation of lithium-ion thin film electrode during the charge-discharge cycles can seriously affect the performance and service life of lithium-ion battery. In this paper, an experimental method for in-situ observation of lithium-ion thin film electrode deformation in charge-discharge process is presented. By designing a new type of laboratory model battery and using the phase shift electron speckle interferometry based on phase increment superposition, this method successfully realizes the in-situ experimental observation of the deformation of the electrode during charging and discharging process. It is shown that the lithium ion thin film electrode can produce periodic deformation in the process of charging and discharging. The deformation is corresponding to the state of charge state (SOC) of the battery and caused by the process of lithium-ion insertion/extraction of the electrode active material. The proposed experimental method provides a powerful experimental method for the study of the influence of thin film electrode deformation on the performance of lithium ion battery. |
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