Encapsulated SnSe in carbon nanofibers as anode of sodium ion batteries with improved properties
Encapsulated SnSe in carbon nanofibers as anode of sodium ion batteries with improved properties
复制标题
碳纳米纤维封装 SnSe 作为钠离子电池阳极，性能得到改善
DOI：
10.1007/s11581-019-03382-x
复制
发表时间：
2020-05
期刊：
影响因子：
2.8
通讯作者：
Zhang Ming
中科院分区：
文献类型：
--
作者：
Zhou Xiaoqian;Ding Shuangshuang;He Hongcheng;Huang Zhao;Cai Mengqiu;Cai Yong;Zhang Ming
由于SnSe具有较高的理论钠存储容量(780mAh/g)，因此通常用作钠离子电池(SIB)的负极材料。然而，电导率低，在钠/脱盐过程中体积膨胀严重，导致循环稳定性差。为了提高碳纳米纤维(CNF)的结构稳定性和循环稳定性，本文开发了一种新的基于静电纺丝的纳米SnSe纳米粒子的合成方法。该方法的显著特点是在电纺液中直接加入Se粉，在热处理过程中不使用Se粉，而是直接加入SnSe纳米粒子包覆在CNFS中。SnSe碳纳米纤维-1(SnSe@CNFS-1)负极材料在室温(25℃)下，100次循环后0.1A/g的放电容量为326mAh/g，1A/g的放电容量为249.4 mAh/g。在0.1A/g下以267mAh/g循环100次后，SnSe纳米粒子在低温(0℃)下仍表现出稳定的电化学性能。这种设计不仅提高了电子传输速度，还防止了SnSe纳米粒子在碱化/脱盐过程中团聚和缓冲电极材料的大体积变化。这一策略还有助于减轻循环过程中负极材料的粉化，提高循环稳定性。
SnSe is commonly used as anode material for sodium ion batteries (SIBs) because of its high theoretical sodium storage capacity (780 mAh/g). However, low electrical conductivity and serious volume expansion during the processes of sodiation/desodiation lead to poor cyclic stability. In this paper, a new synthesis strategy based on electrospinning was developed for encapsulated SnSe nanoparticles in carbon nanofibers (CNFs) to improve the structural and cyclic stability. The significant feature of this method is that selenium (Se) powder is directly added into electrospinning solution during annealing treatment to form SnSe nanoparticles encapsulated in CNFs instead of using Se powder during the thermal treatment process. SnSe carbon nanofibers-1 (SnSe@CNFs-1) anode material exhibits the discharge capacities of 326 mAh/g at 0.1 A/g after 100 cycles and 249.4 mAh/g at 1 A/g after 900 cycles at room temperature (25 °C). It still exhibits stable electrochemical performance at low temperature (0 °C) after 100 cycles of 267 mAh/g at 0.1 A/g. This design not only improves the rate of electron transmission but also prevents SnSe nanoparticles from agglomerating and buffering the large volume changes of electrode material during sodiation/desodiation processes. This strategy also helps to alleviate pulverization of anode material during the recycling process and improve the cycle stability.
登录
查看更多内容
紫外光辅助合成珊瑚 SnO2：表征及其增强的光催化性能
DOI：
10.1016/j.colsurfa.2012.03.018
发表时间：
2012-05
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects
影响因子：
--
作者：
Wang, Xin;Fan, Huiqing;Ren, Pengrong
通讯作者：
Ren, Pengrong
具有高容量Na/K存储能力的Sn散布MoS2/C纳米片
影响因子：
4
作者：
Yin Dangui;Chen Zhi;Zhang Ming
通讯作者：
Zhang Ming
MoSe2 纳米片在石墨烯上垂直生长，并具有 Mo-C 键合，用于钠离子电容器
影响因子：
17.6
作者：
Xu Zhao;Wei Cai;Ying Yang;Xuedan Song;Zachary G. Neale;Yu Li;Jiehe Sui;Guozhong Cao
通讯作者：
Guozhong Cao
影响因子：
29.4
作者：
Ji, Liwen;Gu, Meng;Liu, Jun
通讯作者：
Liu, Jun
影响因子：
9.2
作者：
Li, Decheng;Sasaki, Yuki;Sato, Yuichi
通讯作者：
Sato, Yuichi