The enhanced anodic performance of highly crimped and crystalline nanofibrillar carbon in lithium-ion batteries

被引：7

作者：

Cho, Hyeon Gu

Kim, Young Jeon

Sung, Yung-Eun

Park, Chong Rae ^{[1
]}

机构：

[1] Seoul Natl Univ, Hyperstruct Organ Mat Res Ctr, Dept Mat Sci & Engn, Carbon Nanomat Design Lab, Seoul 151744, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea

来源：

ELECTROCHIMICA ACTA | 2007年 / 53卷 / 02期

关键词：

highly crimped and crystalline carbon; nanofibrils; transmission electron microscopy; electrochemical performance; Li-ion battery;

D O I：

10.1016/j.electacta.2007.08.003

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

To find a novel high-performance anode material for lithium-ion batteries, a new form of carbon characterized by highly crimped and crystalline nanofibrillar microtextures was produced by heat treating polyacrylonitrile/FeCl3 hybrid precursor and subsequent thermal annealing under hydrogen gas. This form of carbon exhibits a rechargeable capacity of similar to 630 mAh/g, which is superior to that of graphite, with a Coulomb efficiency of similar to 70%. Further, the new form of carbon was found to exhibit an efficiency of lithium ion insertion/extraction of similar to 100% in the voltage range from 0.06 to 0.80 V, with a capacity of similar to 400 mAh/g. We speculate that this excellent capacity is due to the characteristic structure of this form of carbon, i.e. its highly entangled web-like hyperstructure consisting of highly crimped and crystalline nanofibrillar microtextures, which enables good permeation and has high resilience to volume deformation during the insertion/extraction of Li ions. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：944 / 950

页数：7

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