大连理工大学  登录  English 
赵纪军
点赞:

教授   博士生导师   硕士生导师

主要任职: 物理学院院长

其他任职: 三束材料改性教育部重点实验室主任

性别: 男

毕业院校: 南京大学

学位: 博士

所在单位: 物理学院

学科: 凝聚态物理

电子邮箱: zhaojj@dlut.edu.cn

手机版

访问量:

开通时间: ..

最后更新时间: ..

Ultrahigh Rate and Long-Life Sodium-Ion Batteries Enabled by Engineered Surface and Near-Surface Reactions

点击次数:

论文类型: 期刊论文

第一作者: Zhao, Changtai

通讯作者: Yu, C; Qiu, JS (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Sch Chem Engn, Liaoning Key Lab Energy Mat & Chem Engn, Dalian 116024, Peoples R China.; Sun, XL (reprint author), Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada.

合写作者: Qiu, Jieshan,Yu, Chang,Qiu, Bo,Zhou, Si,Zhang, Mengdi,Huang, Huawei,Wang, Biqiong,Zhao, Jijun,Sun, Xueliang

发表时间: 2018-02-15

发表刊物: ADVANCED MATERIALS

收录刊物: ESI高被引论文、SCIE、EI、PubMed

卷号: 30

期号: 7

ISSN号: 0935-9648

关键字: graphene; high rate capability; MoS2; sodium ion batteries; surface reactions

摘要: To achieve the high-power sodium-ion batteries, the solid-state ion diffusion in the electrode materials is a highly concerned issue and needs to be solved. In this study, a simple and effective strategy is reported to weaken and degrade this process by engineering the intensified surface and near-surface reactions, which is realized by making use of a sandwich-type nanoarchitecture composed of graphene as electron channels and few-layered MoS2 with expanded interlayer spacing. The unique 2D sheet-shaped hierarchical structure is capable of shortening the ion diffusion length, while the few-layered MoS2 with expanded interlayer spacing has more accessible surface area and the decreased ion diffusion resistance, evidenced by the smaller energy barriers revealed by the density functional theory calculations. Benefiting from the shortened ion diffusion distance and enhanced electron transfer capability, a high ratio of surface or near-surface reactions is dominated at a high discharge/charge rate. As such, the composites exhibit the high capacities of 152 and 93 mA h g(-1) at 30 and 50 A g(-1), respectively. Moreover, a high reversible capacity of 684 mA h g(-1) and an excellent cycling stability up to 4500 cycles can be delivered. The outstanding performance is attributed to the engineered structure with increased contribution of surface or near-surface reactions.

辽ICP备05001357号 地址:中国·辽宁省大连市甘井子区凌工路2号 邮编:116024
版权所有:大连理工大学