Electro-Organic Division, CSIR-Central Electrochemical Research Institute , Karaikudi, 630 003, India.
Academy of Scientific and Innovative Research (AcSIR), CSIR-CECRI , Karaikudi, 630 003, India.
ACS Appl Mater Interfaces. 2017 Nov 15;9(45):39326-39335. doi: 10.1021/acsami.7b10882. Epub 2017 Nov 1.
Nitrogen rich, porous spherical carbon particle with the large surface area was synthesized by simple pyrolysis of the amorphous covalent organic framework. The obtained mesoporous spherical carbon particles with dilated interlayer distance (0.377 nm), large surface area (390 m g) and high level nitrogen doping (10.9%) offer eminent electrochemical performance as an anode for both lithium ion (LIBs) and sodium ion batteries (SIBs). In LIB applications, the synthesized material delivers an average reversible capacity of 820 mAh g after 100 cycles at 0.1 A g, superior rate capability of 410 and 305 mAh g at 4.0 and 8.0 A g respectively. In SIBs, the material shows the stable reversible capacity of about 238 mAh g for the studied 500 cycles at 0.5 A g. The rate and steady state cycling performance at high current densities are impressive, being as high as 165 mAh g even after 250 cycles at 2.0 A g.
富氮、多孔的球形碳颗粒具有较大的比表面积，是通过无定形共价有机骨架的简单热解合成的。所得介孔球形碳颗粒具有膨胀的层间距（0.377nm）、大的比表面积（390m²/g）和高氮掺杂水平（10.9%），在锂离子（LIBs）和钠离子电池（SIBs）的应用中表现出优异的电化学性能。在 LIB 应用中，该合成材料在 0.1Ag 的电流密度下循环 100 次后，平均可逆容量为 820mAh/g，在 4.0A/g 和 8.0A/g 的电流密度下分别具有 410mAh/g 和 305mAh/g 的优异倍率性能。在 SIBs 中，该材料在 0.5Ag 的电流密度下经过 500 次循环后，稳定的可逆容量约为 238mAh/g。在高电流密度下的倍率和稳定循环性能令人印象深刻，即使在 2.0Ag 的电流密度下循环 250 次后，仍高达 165mAh/g。
