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A High‐Capacity Tellurium@Carbon Anode Material for Lithium‐Ion Batteries
Author(s) -
Zhang Juan,
Yin YaXia,
You Ya,
Yan Yang,
Guo YuGuo
Publication year - 2014
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201402069
Subject(s) - anode , electrochemistry , lithium (medication) , tellurium , microporous material , materials science , cathode , carbon fibers , chemical engineering , ion , molecule , nanotechnology , chemistry , electrode , composite material , organic chemistry , metallurgy , medicine , composite number , engineering , endocrinology
The electrochemical properties of helical‐chain Te n molecules confined in a microporous carbon host (MPC) are reported here, showing potential as an attractive anode for Lithium‐ion batteries. These confined Te n molecules provide a high reversible volumetric capacity of 2558 mAh cm −3 , with a redox potential of 1.5 V (vs. Li + /Li) (≈4.2 times higher than that of a Li 4 Ti 5 O 12 anode, 613 mAh cm −3 , 1.55 V vs. Li + /Li). The anode also exhibits an excellent high‐rate capability (998 mAh cm −3 at 10 C ) and admirable long‐term cyclic stability (capacity retention of 85 % over 1000 cycles), benefiting from the good confinement of the MPC host and intrinsically superior conductivity of Te n chains inside it. Furthermore, a new type of Li‐ion full cell is successfully constructed with this tellurium@carbon anode and a traditional LiMn 0.33 Ni 0.33 Co 0.33 O 2 cathode, which shows outstanding performance. All these unique merits show promise for the tellurium‐molecule‐based material as an attractive anode for building next‐generation Li‐ion batteries with high energy density and safe operation.