Negative electrode plate, electrochemical energy storage apparatus and electronic apparatus
AssigneeZhuhai Cosmx Battery Co., Ltd.
InventorsChunyang LIU, Ruofan CHEN, Suli LI
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Abstract
Disclosed are a negative electrode plate, an electrochemical energy storage apparatus and an electronic apparatus comprising the negative electrode plate. A negative electrode active material of the negative electrode plate includes a first amorphous carbon material. An interlayer spacing d002 of the first amorphous carbon material is greater than 0.34 nm, and an average pore diameter of pores of the first amorphous carbon material ranges from 2 nm to 20 nm. The negative electrode plate can help improve energy density of a lithium-ion battery and suppress expansion of an electrochemical energy storage apparatus during cycling.
Claims20
A negative electrode plate, comprising a current collector and a negative electrode active layer disposed on at least one function surface of the current collector, wherein a negative electrode active material of the negative electrode active layer comprises a first amorphous carbon material;
- and
- an interlayer spacing d002 of the first amorphous carbon material is greater than 0.34 nm, and an average pore diameter of pores of the first amorphous carbon material ranges from 2 nm to 20 nm.
The negative electrode plate according to claim 1, wherein the negative electrode active material comprises a mixture of the first amorphous carbon material and a graphite material. The negative electrode plate according to claim 9, wherein a ratio of an average particle size d3 of the graphite material to an average particle size d1 of the first amorphous carbon material is (0.95-8.3):1;
- and/or
- a mass percentage of the first amorphous carbon material in the mixture is not less than 28%.
The negative electrode plate according to claim 15, wherein a mass percentage of the silicon-based material in the mixture ranges from 0.3% to 20%.
Dependencies are inferred from the claim text.