Hainan University

Yong Chen

Yan Mo

Chen Chen

Bokai Cao

Heng Zheng

A preparation method of zinc-carbon composite electrode material for zinc ion energy storage device, which includes preparing a zinc-carbon composite negative electrode material, preparing an electrode paste, and preparing a battery electrode; the zinc-carbon composite negative electrode material provided in the present invention can enhance a capacity of the zinc ion energy storage device, enhance a cycle stability of the device, has strong expandability, significantly improves the performance of the zinc ion energy storage device, increases the energy density and prolong the service life, and is easy to be popularized on a large scale.

Preparation method of a zinc-carbon composite electrode material used in zinc ion energy storage device

Provided is a method for preparing a hard carbon anode of a lithium/sodium ion battery by biochar, which includes the following steps: S1 biochar pretreatment, S2, preparing a precursor material and S3 pyrolysis carbonization, by a modification of the biochar, setting carbonization temperature and carbonization time, and controlling a cooling rate, so that the obtained biochar generates amorphous carbon after carbonization with low graphitization degree, few surface defects, larger charge-discharge specific capacity, and stable performance in the cycle charging and discharging process; at the same time, the process of the application is relatively simple, and a special complex process is reduced; the present method is suitable for a large-scale industrial production without special adjustment or control of a morphology; and the product performance is relatively good and thus has certain competitive advantages.

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Hainan, China

Yong Chen