文献类型：期刊文献

英文题名：Amorphous Phosphorus/Nitrogen-Doped Graphene Paper for Ultrastable Sodium-Ion Batteries

作者：Zhang, Chao[1];Wang, Xi[1,2];Liang, Qifeng[3];Liu, Xizheng[4];Weng, Qunhong[1];Liu, Jiangwei[1];Yang, Yijun[2];Dai, Zhonghua[5];Ding, Kejian[2];Bando, Yoshio[1];Tang, Jie[5];Golberg, Dmitri[1]

机构：[1]Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton WPI MANA, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan;[2]Beijing Jiaotong Univ, Sch Sci, Beijing 100044, Peoples R China;[3]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China;[4]Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin Key Lab Adv Funct Porous Mat, Tianjin 300384, Peoples R China;[5]Natl Inst Mat Sci, Sengen 1-2-1, Tsukuba, Ibaraki 3050047, Japan

年份：2016

卷号：16

期号：3

起止页码：2054

外文期刊名：NANO LETTERS

收录：SCI-EXPANDED(收录号：WOS:000371946300078)、、EI(收录号：20161202112231)、Scopus(收录号：2-s2.0-84960511036)、WOS

基金：This work was supported by the International Center for Young Scientists (ICYS), World Premier International (WPI) Research Center on Materials Nanoarchitectonics (MANA), MEXT, Japan. We are also grateful for the support of this work by the "1000-Youth Talents Plan". Q. L. acknowledges the support from NSFC (No. 11574215) and SRF for ROCS, SEM.

语种：英文

外文关键词：amorphous phosphorus; phase-transformation; sodium-ion battery; in-situ TEM; anode

外文摘要：As the most promising anode material for sodium-ion batteries (SIBs), elemental phosphorus (P) has recently gained a lot of interest due to its extraordinary theoretical capacity of 2596 mAh/g. The main drawback of a P anode is its low conductivity and rapid structural degradation caused by the enormous volume expansion (>490%) during cycling. Here, we redesigned the anode structure by using an innovative methodology to fabricate flexible paper made of nitrogen-doped graphene and amorphous phosphorus that effectively tackles this problem. The restructured anode exhibits an ultrastable cyclic performance and excellent rate capability (809 mAh/g at 1500 mA/g). The excellent structural integrity of the novel anode was further visualized during cycling by using in situ experiments inside a high-resolution transmission electron microscope (HRTEM), and the associated sodiation/desodiation mechanism was also thoroughly investigated. Finally, density functional theory (DFT) calculations confirmed that the N-doped graphene not only contributes to an increase in capacity for sodium storage but also is beneficial in regards to improved rate performance of the anode.