NEGATIVE ELECTRODE FOR LITHIUM ION CELL BATTERY, LITHIUM ION CELL BATTERY, METHOD OF MANUFACTURING NEGATIVE ELECTRODE FOR LITHIUM ION CELL BATTERY, AND METHOD OF MANUFACTURING LITHIUM ION CELL BATTERY
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United States of America
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Jan 9, 2025
app pub date -
Dec 9, 2021
filing date -
Dec 9, 2021
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a negative electrode for a lithium ion cell battery capable of increasing a cell battery capacity and improving cell battery characteristics such as cycle characteristics is provided. A negative electrode mixture layer 1M including a negative electrode active material, a binder, and hydrophobized cellulose is formed as described below. The negative electrode active material includes nano-Si, the binder is an organic solvent-based binder (polyimide or polyvinylidene fluoride), and the hydrophobized cellulose results from substitution of a part of hydrophilic groups of cellulose by a hydrophobic group. When the organic solvent-based binder is used as described above, reaction between water and Si can be prevented, and the electrode characteristics can be improved. In a general technique, the addition amount of the organic solvent-based binder needs to be increased because of use of the Nano-Si, and therefore, this decreases the cell battery capacity and the cycle characteristics (cell battery life). However, by addition of the hydrophobized CeNF, the cell battery capacity and the cycle characteristics (cell battery life) can be improved.
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