以LiCoO2为阴极的全固态薄膜锂电池的研究 |
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作者单位: | 复旦大学化学系激光化学研究所,上海市分子催化和功能材料重点实验室,上海,200433;复旦大学化学系激光化学研究所,上海市分子催化和功能材料重点实验室,上海,200433;复旦大学化学系激光化学研究所,上海市分子催化和功能材料重点实验室,上海,200433 |
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基金项目: | 中国科学院项目(非规范项目) |
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摘 要: |
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关 键 词: | LiCoO2 磁控溅射 LiPON 全固态薄膜锂电池 |
All-Solid-State Thin Film Lithium Batteries with LiCoO2 Cathodes |
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Authors: | Liu Wenyuan Fu Zhengwen Qin Qizong |
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Abstract: | Amorphous and oriented polycrystalline LiCoO2 thin films, used as cathode material for an all-solid-state thin film battery, were fabricated by using RF magnetron sputtering and annealed at different temperatures. The morphology and structure of LiCoO2 thin films were characterized by scanning electron microscopy and X-ray diffraction. All-solid-state thin film batteries, comprised of LiCoO2 cathode films with different structures, lithium phosphorous oxynitride electrolyte film and metallic lithium anode film, was successfully prepared and their properties were examined by chronopotentiometry. Results showed that the structure and crystallinity of the LiCoO2 films strongly influenced the electrochemical performance of all-solid-state thin film lithium batteries. Worth nothing was the battery with an oriented polycrystalline LiCoO2 film it exhibited the best electrochemical performance, and delivered a discharge capacity of ~55.4 μAh/cm2μm. Furthermore, when subjected to over 450 charge/discharge cycles, that battery suffered no obvious fode in capacity. |
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Keywords: | LiCoO2 RF sputtering LiPON, All-solid-state thin film lithium battery |
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