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Rational Design of Core‐Shell Structured C@SnO 2 @CNTs Composite with Enhanced Lithium Storage Performance
Author(s) -
Cheng Yayi,
Huang Jianfeng,
Cao Liyun,
Xie Hui,
Yu Fangli,
Xi Shaohua,
Shi Bingyao,
Li Jiayin
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901732
Subject(s) - anode , materials science , composite number , annealing (glass) , carbon nanotube , electrochemistry , lithium (medication) , nanotechnology , oxide , chemical engineering , carbon fibers , current density , composite material , electrode , metallurgy , chemistry , medicine , endocrinology , engineering , physics , quantum mechanics
SnO 2 is considered to be a potential anode material in lithium‐ion batteries (LIBs) owing to its high specific capacity of 1494 mAh g −1 . Herein, we reported the unique core‐shell structured C@SnO 2 @CNTs composite with controllable outer carbon thickness, which was synthesized by a simple hydrothermal method and subsequent annealing process. Results show that the C@SnO 2 @CNTs with outer carbon layer around 1.8 nm displays high reversible capacity and long‐term cycling performance. It maintains a capacity of 850 mAh g −1 should be at current density of 200 mA g −1 up to 100 cycles. Further analysis found that the C@SnO 2 @CNTs composite exhibits excellent structural stability even after 100 cycles, which contributes to provide a highway for charge transmission. These results give rise to superior electrochemical performance of C@SnO 2 @CNTs composite and provide new insight for design metal oxide composite anode materials in LIBs field.