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AssigneeZhuhai Smoothway Electronic Materials Co., Ltd.
InventorsChong Mao, Jing Bai, Pipi Wang, Dongyou Pan, Yi An Zeng, Wenliang Dai, Xiaobing Dai
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A preparation method of CsDFP for aqueous negative electrode slurry includes carrying out ion exchange reactions with LiPO2F2 and a cesium source. The activation energy of Li+ intercalation in the negative electrode is reduced due to the existence of Cs+, leading to a better rate performance. Further, the impedance growth rate of the batteries is reduced and the high temperature storage performance is excellent since PO2F2— participates in the electrochemical reaction to form a stable low-impedance SEI film on the surface of the negative electrode plate. Moreover, films are continuously formed to repair the SEI films under the gradual release of CsDFP, which is conducive to inhibiting the growth of lithium dendrites during long-term high-rate cycling, thereby obtaining an improved cycle performance.
A preparation method of a negative electrode plate, comprising:
A secondary battery, comprising a positive electrode plate, a negative electrode plate and a separator spaced between the positive electrode plate and the negative electrode plate,
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