Extraction of spent graphite from end-of-life lithium-ion battery involves sonicating spent graphite electrode on copper foil of end-of-life lithium-ion battery with deionized water to retrieve spent graphite from copper foil
	BATABYAL S K; SANTHANAGOPALAN D; SURESH S
	2024-12-24
专利权人	AMRITA VISHWA VIDYAPEETHAM (AMRI-Non-standard)
申请日期	2024-12-24
专利号	IN202441102866-A
成果简介	NOVELTY - Extraction of spent graphite (SG) from end-of-life (EoL) lithium-ion battery (LIB) involves (a) sonicating spent graphite electrode on copper foil of EoL LIB with deionized water (DI) water to retrieve SG from the copper foil, (b) centrifuging SG with N-methyl 2-pyrrolidone (NMP) thrice followed by a single wash with DI to remove the binder impurities, and heating SG at a rate of 1-20 K/minutes under an argon atmosphere with temperature ranging from 773-1273 K and subjecting to thermal annealing for a total duration of 1-12 hours. USE - Method for extraction of spent graphite (SG) from end-of-life (EoL) lithium-ion battery (LIB). ADVANTAGE - The method has enhanced the performance for aqueous zinc ion battery (AZIB) applications, GO exhibits remarkably higher surface area and exhibits good electrochemical performance in terms of charge capacity and cycling stability than the GO synthesized from commercial graphite powder, improves the crystallinity as well as conductivity, enhances the enhanced electrochemical performance of synthesized GO. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method for the preparation of GO from SG of EoL LIB, which involves (a) providing SG extracted from EoL LIB, (b) mixing SG with sodium nitrate and sulfuric acid continuously in an ice bath condition for 2 hours to form the suspension, (c) adding potassium permanganate to the suspension and raising the temperature from 303-328 K within 2 hours until the suspension becomes pasty brownish, (d) adding DI water to the suspension, for evolution of brisk effervescence, and raising the reaction temperature to 369 K abruptly and treating the suspension with hydrogen peroxide to form GO nano sheets; (2) a cathode active material, which comprises GO nanosheets GO synthesized from SG of EoL LIBs; (3) an electrode, which comprises the cathode active material to 70-80 wt.% electrode, 20-10 wt.% carbon additive selected from multi-walled carbon nanotubes (MW-CNT), carbon black (CB), and 10 wt.% binder selected from polyvinylidene difluoride (PVDF), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP); and (4) an aqueous zinc ion battery (AZIB), which comprises a zinc foil as anode, a cathode comprising 70-80 wt.% of GO nanosheets GO, 20-10 wt.% of conductive additive and 10 wt.% of binder, where the composite is loaded onto a carbon cloth substrate, the GO has BET specific surface area of 30 m 2 g-1 or greater, or exhibits a broad peak in XRD using Cu Kα radiation at 12.9° corresponding to a lattice spacing of 0.42 nm, a glass microfiber as separator placed between the anode and the cathode, an electrolyte comprising zinc sulfate or zinc perchlorate or zinc triflate dissolved in water with a concentration range between 1-5 M in contact with the anode, and cathode via the separator.
IPC 分类号	H01M-010/0525 ; H01M-010/36 ; H01M-004/02 ; H01M-004/133 ; H01M-004/525
国家	印度
专业领域	材料科学
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/13849
专题	中国科学院新疆生态与地理研究所
作者单位	AMRITA VISHWA VIDYAPEETHAM (AMRI-Non-standard)
推荐引用方式 GB/T 7714	BATABYAL S K,SANTHANAGOPALAN D,SURESH S. Extraction of spent graphite from end-of-life lithium-ion battery involves sonicating spent graphite electrode on copper foil of end-of-life lithium-ion battery with deionized water to retrieve spent graphite from copper foil. IN202441102866-A[P]. 2024.

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