材料科学
石墨
阳极
电极
石墨烯
复合材料
阴极
电解质
化学工程
纳米技术
电气工程
化学
物理化学
工程类
作者
Ning Yao,Fu Liu,Yiming Zou,Helin Wang,Min Zhang,Xiaoyu Tang,Zhiqiao Wang,Miao Bai,Ting Liu,Wenyu Zhao,Rongrong Xue,Yuyao Liu,Yanwei Ma
标识
DOI:10.1016/j.ensm.2022.12.001
摘要
The alarming resource shortage of the lithium battery supply chain has triggered new vitality to the close-loop recycling of retired batteries. As compared to hydrometallurgy or pyrometallurgy strategies for the cathode recovery, the proper use of degraded graphite anodes, featuring with the solvated Li+ intercalation and in-plane defect formation, is hitherto neglected. In this work, we propose a facile “green route” to extract values from spent graphite anode. Through elucidating the dynamic Li occupancy in graphite lattice, an up-scaling delamination protocol is developed with the aid of in-situ generated H2 bubbles in the protic mixed solvent, to weaken van der Waals (vdW) bonding of the graphite interlayers and generate few-layer graphene flakes (∼ 2 nm); meanwhile high-purity Li salt could be simultaneously extracted from the residue solvent (∼ 98% Li leaching efficiency). Upon exquisite interfacial modification, the as-exfoliated graphene flakes tend to assemble with the Na2Ti6O13 (NTO) nanosheets as a layer-stacked, mechanical-flexible anode, which further demonstrates a robust cycling at various flexing states and extreme power output of 1142 Wkg−1 as paired with the LiFePO4 cathode (5.3 mg cm−2) in the integrated, thin-film battery. This work vividly demonstrates potential add-value market of spent anodes in the flexible power sources.
科研通智能强力驱动
Strongly Powered by AbleSci AI