A flexible thin film lithium battery with a chemical vapor deposited organic complex cathode
A flexible thin film lithium battery with a chemical vapor deposited organic complex cathode
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一种具有化学气相沉积有机复合阴极的柔性薄膜锂电池
DOI：
10.1039/d1ta10867k
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发表时间：
2022-03-04
影响因子：
11.9
通讯作者：
Tenhaeff, Wyatt E.
中科院分区：
文献类型：
--
作者：
Li, Zhuo;Hu, Fei;Tenhaeff, Wyatt E.
近年来，有机正极材料引起了人们极大的关注，但其低的电子电导率限制了其作为锂电池固态正极的应用。本工作描述了一种新型的有机阴极化学的发展与显着的固有电子导电性的固态薄膜电池。通过引发化学气相沉积（iCVD）制备聚合物电荷转移络合物（CTC）阴极，聚（4-乙烯基吡啶）-一氯化碘（P4 VP中心点ICl）。关键的化学，物理和电化学性质的CTC复杂的特征。该配合物在室温下的电子电导率为4 × 10（-7）S cm（-1），总电导率为2 × 10（-6）S cm（-1），可制成2.7 μ m厚的致密阴极。通过制造P4 VP中心点ICl，|LIPON| Li薄膜电池，P4 VP中心点ICl在刚性和柔性基板上的放电容量被证明为>320 mA h cm（-3）。柔性P4 VP中心点ICl| LIPON|通过简单地用柔性聚酰亚胺基板代替刚性基板来制备锂电池，并且所制备的电池可以弯曲180度，同时保持电化学性能。
Organic cathode materials have attracted significant research attention recently, yet their low electronic conductivity limits their application as solid-state cathodes in lithium batteries. This work describes the development of a novel organic cathode chemistry with significant intrinsic electronic conductivity for solid-state thin film batteries. A polymeric charge transfer complex (CTC) cathode, poly(4-vinylpyridine)-iodine monochloride (P4VP center dot ICl), was prepared by initiated chemical vapor deposition (iCVD). Critical chemical, physical, and electrochemical properties of the CTC complex were characterized. The complex was found to have an electronic conductivity of 4 x 10(-7) S cm(-1) and total conductivity of 2 x 10(-6) S cm(-1) at room temperature, which allows the construction of a 2.7 mu m thick dense cathode. By fabricating a P4VP center dot ICl|LIPON|Li thin film battery, the discharge capacity of P4VP center dot ICl was demonstrated to be >320 mA h cm(-3) on both rigid and flexible substrates. The flexible P4VP center dot ICl|LIPON|Li battery was prepared by simply replacing the rigid substrate with a flexible polyimide substrate and the as-prepared battery can be bent 180 degrees while maintaining electrochemical performance.