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Approaching the Lithiation Limit of MoS 2 While Maintaining Its Layered Crystalline Structure to Improve Lithium Storage
Author(s) -
Zhu Zhiqiang,
Tang Yuxin,
Leow Wan Ru,
Xia Huarong,
Lv Zhisheng,
Wei Jiaqi,
Ge Xiang,
Cao Shengkai,
Zhang Yanyan,
Zhang Wei,
Zhang Hongwei,
Xi Shibo,
Du Yonghua,
Chen Xiaodong
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201813698
Subject(s) - lithium (medication) , materials science , transition metal , nanotechnology , electrode , diffusion , ion , chemical engineering , battery (electricity) , energy storage , chemistry , catalysis , organic chemistry , medicine , power (physics) , quantum mechanics , physics , engineering , thermodynamics , endocrinology
MoS 2 holds great promise as high‐rate electrode for lithium‐ion batteries since its large interlayer can allow fast lithium diffusion in 3.0–1.0 V. However, the low theoretical capacity (167 mAh g −1 ) limits its wide application. Here, by fine tuning the lithiation depth of MoS 2 , we demonstrate that its parent layered structure can be preserved with expanded interlayers while cycling in 3.0–0.6 V. The deeper lithiation and maintained crystalline structure endows commercially micrometer‐sized MoS 2 with a capacity of 232 mAh g −1 at 0.05 A g −1 and circa 92 % capacity retention after 1000 cycles at 1.0 A g −1 . Moreover, the enlarged interlayers enable MoS 2 to release a capacity of 165 mAh g −1 at 5.0 A g −1 , which is double the capacity obtained under 3.0–1.0 V at the same rate. Our strategy of controlling the lithiation depth of MoS 2 to avoid fracture ushers in new possibilities to enhance the lithium storage of layered transition‐metal dichalcogenides.