Invention Grant
US07767340B2 Non-aqueous electrolyte secondary battery and method of producing coating for negative electrode active material thereof 有权
非水电解质二次电池及其负极活性物质用涂料的制造方法

Non-aqueous electrolyte secondary battery and method of producing coating for negative electrode active material thereof
Abstract:
A non-aqueous electrolyte secondary battery having a positive electrode and a negative electrode with an active material capable of absorbing and desorbing lithium, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. The negative electrode active material is covered by a coating having elasticity. The fully elastic coating expands and contracts following the volume change of the negative electrode active material; thus, the coating brings out its desired functions without being damaged or broken. Regardless of the degree of the volume change of the negative electrode active material, a lasting coating without damage is formed on the negative electrode active material, to improve performances of the non-aqueous electrolyte secondary battery.
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