Thin film graphite electrodes with low stress generation during Li-intercalation
Thin film graphite electrodes with low stress generation during Li-intercalation
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DOI：
10.1016/j.carbon.2011.02.067
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发表时间：
2011-07-01
期刊：
影响因子：
10.9
通讯作者：
Sheldon, Brian W.
中科院分区：
文献类型：
--
作者：
Mukhopadhyay, Amartya;Tokranov, Anton;Sheldon, Brian W.
我们在这里报告了锂离子电池的薄膜“石墨”电极的发展，具有接近理论的锂嵌入/脱嵌容量（类似于372 mAh/g）。这些膜，通过化学气相沉积在1000摄氏度的相对低的温度下合成，表现出强石墨秩序与基面平行于Ni集电器取向。在恒电流循环期间，原位应力测量显示完全锂化对应于仅类似于~ 250 MPa的适度面内压缩应力的发展。这些应力比预期的低一个数量级以上，这将促进长循环寿命。(C)2011爱思唯尔有限公司保留所有权利。
We report here the development of thin film 'graphite' electrodes for Li-ion batteries, with near theoretical Li-intercalation/de-intercalation capacity (similar to 372 mAh/g). These films, synthesized by chemical vapor deposition at a relatively low temperature of 1000 degrees C, exhibit strong graphitic order with the basal planes oriented parallel to the Ni current collector. During galvanostatic cycling, in-situ stress measurements show that full lithiation corresponds to the development of only modest in-plane compressive stresses of similar to -250 MPa. These stresses are more than an order of magnitude lower than expected, which should promote long cycle life. (C) 2011 Elsevier Ltd. All rights reserved.