PRE-LITHIATED NEGATIVE ELECTRODE FABRICATION METHOD, FABRICATED PRE-LITHIATED NEGATIVE ELECTRODE, ENERGY STORAGE DEVICE, ENERGY STORAGE SYSTEM, AND ELECTRICAL DEVICE

WIPO Patent Application WO/2020/124328

A1

The present application relates to the field of new energy. Specifically, a pre-lithiated negative electrode fabrication method, a fabricated pre-lithiated negative electrode, an energy storage device, an energy storage system, and an electrical device are provided. The pre-lithiated negative electrode fabrication method comprises: providing a half-cell, and charging or discharging the half-cell. An operation electrode of the half-cell is a metal material, and a counter electrode is a material capable of providing a lithium source. An electrolyte is a lithium salt solution containing additives. The metal material is a metal, an alloy, or a metal composite material capable of reacting with lithium ions to form an alloy. The additives comprise a substance capable of decomposing and forming an SEI film on a surface of the metal material. The method has a simple process, and is low-cost. The method forms an SEI passivation film on the surface of the metal material to prevent volume expansion and pulverization of the negative electrode, thereby improving the stability of the negative electrode. In addition, the alloy formed by means of pre-lithiation improves Coulombic efficiency, thereby improving discharging capacity and cycling performance.

TANG YONGBING (CN)
ZHANG GE (CN)
OU XUEWU (CN)

PCT/CN2018/121573

June 25, 2020

December 17, 2018

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SHENZHEN INST ADV TECH (CN)

H01M10/0525

CN105097293A	2015-11-25
CN104319115A	2015-01-28

SHENZHEN KEJIN INTELLECTUAL PROPERTY OFFICE (CN)

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