	US 12,126,023 B2
	Hard carbon, method for preparing same, secondary battery comprising same, and electrical apparatus comprising same
Xiaoxia Chen, Ningde (CN); Xinxin Zhang, Ningde (CN); Chuying Ouyang, Ningde (CN); Yongsheng Guo, Ningde (CN); Jiarui Tian, Ningde (CN); Yu Ma, Ningde (CN); Ben Liu, Ningde (CN); and Xiaoji Zheng, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hongkong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Sep. 18, 2023, as Appl. No. 18/469,449.
Application 18/469,449 is a continuation of application No. PCT/CN2021/143486, filed on Dec. 31, 2021.
Prior Publication US 2024/0014394 A1, Jan. 11, 2024
Int. Cl. H01M 4/583 (2010.01); C01B 32/05 (2017.01); H01M 4/02 (2006.01)

CPC H01M 4/583 (2013.01) [C01B 32/05 (2017.08); C01P 2002/72 (2013.01); C01P 2002/82 (2013.01); C01P 2004/03 (2013.01); C01P 2004/61 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2220/20 (2013.01)]

19 Claims

1. A hard carbon, wherein a total quantity of adsorbed nitrogen under a relative pressure P/P₀of nitrogen between 10⁻⁸and 0.035 is V₁cm³(STP)/g and a total quantity of adsorbed nitrogen under a relative pressure P/P₀of nitrogen between 0.035 and 1 is V₂cm³(STP)/g in a nitrogen adsorption isotherm determined at a temperature of 77 K for the hard carbon, and the hard carbon satisfies: V₂/V₁≤0.20 and 20≤V₁≤150, wherein P represents an actual pressure of nitrogen, and P₀represents a saturated vapor pressure of nitrogen at a temperature of 77 K.