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Nitrogen‐Doped Carbon as a Host for Tellurium for High‐Rate Li–Te and Na–Te Batteries
Author(s) -
Li Yi,
Zhang Youquan,
Xu Qiuju,
Hu Linyu,
Shen Bolei,
Liu Heng,
Dai Chunlong,
Bao Shujuan,
Xu Maowen
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.201802598
Subject(s) - tellurium , materials science , heteroatom , carbon fibers , lithium (medication) , electrochemistry , chemical engineering , porosity , inorganic chemistry , composite number , composite material , chemistry , metallurgy , organic chemistry , electrode , engineering , endocrinology , medicine , ring (chemistry)
A nitrogen‐doped hierarchical porous carbon sponge, used as a matrix for tellurium accommodation, was designed and prepared in this work. The porosity of the matrix played an important role in enhancing the electrochemical performance of Li/Na–Te batteries. Specifically, the mesopores could accommodate active materials whereas the macropores provided sufficient space for partial Te accommodation and volume expansion in discharge. In addition, N heteroatoms in carbon species could enhance the electrical conductivity and widen its application in lithium/sodium storage. The monolithic and flaky architecture of the nitrogen‐doped hierarchical porous carbon sponge/tellurium composite offered a highly conductive network for fast electron transportation. As a result, the nitrogen‐doped hierarchical porous carbon sponge/tellurium composite achieved a superior rate performance for Li–Te and Na–Te batteries.