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Fibrous Network of C@MoS 2 Nanocapsule‐Decorated Cotton Linters Interconnected by Bacterial Cellulose for Lithium‐ and Sodium‐Ion Batteries
Author(s) -
Zhou Huimin,
Lv Pengfei,
Lu Xiaomin,
Hou Xuebin,
Zhao Min,
Huang Jieyu,
Xia Xin,
Wei Qufu
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201902445
Subject(s) - anode , bacterial cellulose , chemical engineering , molybdenum disulfide , lithium (medication) , materials science , nanotechnology , ion , membrane , raman spectroscopy , cellulose , chemistry , electrode , composite material , organic chemistry , medicine , biochemistry , physics , optics , engineering , endocrinology
To protect the structure of MoS 2 from collapse, a strong skeleton is expected to help maintain the integrity. In this study, cotton linters burdened with hollow C@MoS 2 nanocapsules are added into nutrient medium for the growth of a bacterial cellulose membrane. Benefitting from good conductivity and structural integrity, the resultant fibrous membrane anode gives reversible capacities of 559 and 155 mAh g −1 for Li‐ion batteries and Na‐ion batteries after 100 cycles, respectively. The structural transformation and component evolution in lithiation–delithiation and sodiation–desodiation was elucidated by in situ Raman spectroscopy. After sodiation, the Na 2 S did not transform back into MoS 2 but was more likely converted into elemental sulfur during the conversion reaction. Layered semiconducting transition metal chalcogenides, such as molybdenum disulfide (MoS 2 ), feature open 2 D ion‐transport channels amenable to receive various guest ions with high theoretical capacities. [2] One serious challenge curtailing the applicability of such materials is their volume changes during discharge–charge processes. [3, 4] However, particular morphologies of MoS 2 are proposed to improve the specific capacity. [5,6,7] Many works have focused on core–shell and hollow MoS 2 micro‐ and nanostructures, and the results validate the advantages of shortening the lithium‐ion diffusion distance and enhancing specific capacity. [8,9] Unfortunately, the issue of inferior capacity stability is not resolved, because the structure is not effectively protected and is prone to collapse.