3D hierarchical porous ZnO/ZnCo2O4 nanosheets as high-rate anode material for lithium-ion batteries

2016 ◽  
Vol 4 (16) ◽  
pp. 6042-6047 ◽  
Author(s):  
Xiaohong Xu ◽  
Kangzhe Cao ◽  
Yijing Wang ◽  
Lifang Jiao

The superior cycling performance of the ZZCO nanosheet electrode benefits from the excellent structural stability.

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Yong Chen ◽  
Xuejun Zhang ◽  
Yanhong Tian ◽  
Xi Zhao

Silicon nanoparticles have been successfully inserted into graphene sheets via a novel method combining freeze-drying and thermal reduction. The structure, electrochemical performance, and cycling stability of this anode material were characterized by SEM, X-ray diffraction (XRD), charge/discharge cycling, and cyclic voltammetry (CV). CV showed that the Si/graphene nanocomposite exhibits remarkably enhanced cycling performance and rate performance compared with bare Si nanoparticles for lithium ion batteries. XRD and SEM showed that silicon nanoparticles inserted into graphene sheets were homogeneous and had better layered structure than the bare silicon nanoparticles. Graphene sheets improved high rate discharge capacity and long cycle-life performance. The initial capacity of the Si nanoparticles/graphene keeps above 850 mAhg−1after 100 cycles at a rate of 100 mAg−1. The excellent cycle performances are caused by the good structure of the composites, which ensured uniform electronic conducting sheet and intensified the cohesion force of binder and collector, respectively.


Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 22
Author(s):  
Nurbolat Issatayev ◽  
Gulnur Kalimuldina ◽  
Arailym Nurpeissova ◽  
Zhumabay Bakenov

New porous activated carbons with a high surface area as an anode material for lithium-ion batteries (LIBs) were synthesized by a one-step, sustainable, and environmentally friendly method. Four chemical activators—H2SO4, H3PO4, KOH, and ZnCl2—have been investigated as facilitators of the formation of the porous structure of activated carbon (AC) from an agar precursor. The study of the materials by Brunauer–Emmett–Teller (BET) and scanning electron microscopy (SEM) methods revealed its highly porous meso- and macro-structure. Among the used chemical activators, the AC prepared with the addition of KOH demonstrated the best electrochemical performance upon its reaction with lithium metal. The initial discharge capacity reached 931 mAh g−1 and a reversible capacity of 320 mAh g−1 was maintained over 100 cycles at 0.1 C. High rate cycling tests up to 10 C demonstrated stable cycling performance of the AC from agar.


2017 ◽  
Vol 5 (44) ◽  
pp. 23221-23227 ◽  
Author(s):  
Hao Wang ◽  
Ziliang Chen ◽  
Yang Liu ◽  
Hongbin Xu ◽  
Licheng Cao ◽  
...  

Hybrid nanocomposites constructed from starfish-like ZnxCo1−xS rooted in porous carbon and strongly coupled carbon nanotubes have been rationally designed and they exhibit excellent lithium-storage performance.


2017 ◽  
Vol 52 (12) ◽  
pp. 7140-7148 ◽  
Author(s):  
Lijuan Wang ◽  
Xiaojie Wang ◽  
Zhaohui Meng ◽  
Hongjiang Hou ◽  
Baokuan Chen

2021 ◽  
Vol 368 ◽  
pp. 137470 ◽  
Author(s):  
Hanyong Wang ◽  
Lecai Wang ◽  
Jiao Lin ◽  
Jingbo Yang ◽  
Feng Wu ◽  
...  

Nano Energy ◽  
2014 ◽  
Vol 4 ◽  
pp. 23-30 ◽  
Author(s):  
Yinzhu Jiang ◽  
Dan Zhang ◽  
Yong Li ◽  
Tianzhi Yuan ◽  
Naoufal Bahlawane ◽  
...  

2014 ◽  
Vol 120 ◽  
pp. 187-192 ◽  
Author(s):  
Haoqing Tang ◽  
Zhiyuan Tang ◽  
Chenqiang Du ◽  
Fuchang Qie ◽  
Jiangtao Zhu

2014 ◽  
Vol 603 ◽  
pp. 144-148 ◽  
Author(s):  
Jinlong Liu ◽  
Haibo Feng ◽  
Jianbo Jiang ◽  
Dong Qian ◽  
Junhua Li ◽  
...  

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