scholarly journals A three layer design with mesoporous silica encapsulated by a carbon core and shell for high energy lithium ion battery anodes

2015 ◽  
Vol 3 (45) ◽  
pp. 22739-22749 ◽  
Author(s):  
Xi Cao ◽  
Xiuyun Chuan ◽  
Robert C. Massé ◽  
Dubin Huang ◽  
Shuang Li ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Lithium Ion Batteries ◽  
Layer Structure ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Energy ◽  
High Rate ◽  
High Rate Capability ◽  
Carbon Core ◽  
A Current

A novel C/SiO2 composite with a carbon–silica–carbon (C-mcms) three layer structure was synthesized and evaluated as an anode material for high-energy lithium ion batteries. The C-mcms exhibits an excellent capacity of about 1055 mA h g−1 at a current density of 500 mA g−1 after 150 cycles without detectable decay, and high-rate capability.

scholarly journals High-Rate Layered Cathode of Lithium-Ion Batteries through Regulating Three-Dimensional Agglomerated Structure

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1602 ◽  
Author(s):  
Jun-Ping Hu ◽  
Hang Sheng ◽  
Qi Deng ◽  
Qiang Ma ◽  
Jun Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Three Dimensional ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
High Rate Capability ◽  
Closed Structure ◽  
Short Lifecycle

LiNixCoyMnzO2 (LNCM)-layered materials are considered the most promising cathode for high-energy lithium ion batteries, but suffer from poor rate capability and short lifecycle. In addition, the LiNi1/3Co1/3Mn1/3O2 (NCM 111) is considered one of the most widely used LNCM cathodes because of its high energy density and good safety. Herein, a kind of NCM 111 with semi-closed structure was designed by controlling the amount of urea, which possesses high rate capability and long lifespan, exhibiting 140.9 mAh·g−1 at 0.85 A·g−1 and 114.3 mAh·g−1 at 1.70 A·g−1, respectively. The semi-closed structure is conducive to the infiltration of electrolytes and fast lithium ion-transfer inside the electrode material, thus improving the rate performance of the battery. Our work may provide an effective strategy for designing layered-cathode materials with high rate capability.

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