In:
ChemElectroChem, Wiley, Vol. 5, No. 18 ( 2018-09-12), p. 2653-2659
Abstract:
Though metal based electrodes have good resistivity, their huge volume changes upon lithiation and interparticle contact resistance should be carefully stressed to achieve high rate lithium storage performances. A yolk‐hollow structure with a continuous conductive framework would solve above problems. Inspired by the yolk‐hollow structure and functions of watermelon‐flesh, we fabricated Sb/amorphous carbon/graphene nanocomposites, in which Sb nanoparticles are formed in‐situ inside the carbon nanocages that are homogeneously decorated on graphene and distributed in a continuous N‐doped amorphous carbon matrix. The generated Sb−O−C bonds improve the electron transfer rate; the carbon nanocages as mini‐electrochemical nanoreactors sustain the volume change; the conductive matrix reduces the contact resistance. The optimized nanocomposite delivers a remarkable reversible capacity of 592 mA h g −1 at 500 mA g −1 with a good cyclability for 400 cycles. A high capacity of 413 mA h g −1 is retained even after 700 cycles at 1000 mA g −1 . Such a long cycle life at the high current density has rarely been reported so far for Sb‐based lithium‐ion battery anodes.
Type of Medium:
Online Resource
ISSN:
2196-0216
,
2196-0216
DOI:
10.1002/celc.201800781
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
2724978-5
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