Fabrication of CNTs/MnO composite as a wrapping layer for surface modification of Cr-doped LiNiMnO for lithium ion batteries

Needle-like MnO 2 is deposited on the surface of CNTs using a simple redox reaction and simultaneously forms a special wrapping layer on the surface and among the particles of Cr-doped LiNi 0.5 Mn 1.5 O 4 through an auto-grow process. The CNTs act as a conductive network of electrons and the needle-...

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Published in:RSC advances 2016-09, Vol.6 (91), p.88719-88726
Main Authors: Zhang, Yu-Hang, Zhao, Qin, Cong, Li-Na, Bao, Sheng-Da, Xie, Hai-Ming, Sun, Li-Qun
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container_issue 91
container_start_page 88719
container_title RSC advances
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creator Zhang, Yu-Hang
Zhao, Qin
Cong, Li-Na
Bao, Sheng-Da
Xie, Hai-Ming
Sun, Li-Qun
description Needle-like MnO 2 is deposited on the surface of CNTs using a simple redox reaction and simultaneously forms a special wrapping layer on the surface and among the particles of Cr-doped LiNi 0.5 Mn 1.5 O 4 through an auto-grow process. The CNTs act as a conductive network of electrons and the needle-like MnO 2 increases the contact points among the particles and furthermore provides additional Li + diffusion paths. The CNTs/MnO 2 composite is also a protective layer to suppress the side reaction between the electrode and the electrolyte. The CNTs/MnO 2 -coated, Cr-doped LiNi 0.5 Mn 1.5 O 4 (CNTs/MnO 2 -Cr-LNMO) shows superior electrochemical properties, with a high specific capacity and excellent cycling stability at high voltage and high rate. Cr-doped LiNi 0.5 Mn 1.5 O 4 decorated by a special CNTs/MnO 2 wrapping layer shows better electrochemical performance.
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title Fabrication of CNTs/MnO composite as a wrapping layer for surface modification of Cr-doped LiNiMnO for lithium ion batteries
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