Improved performances of a LiNi0.6Co0.15Mn0.25O2 cathode material with full concentration-gradient for lithium ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103747-103753 ◽  
Author(s):  
Zhonghui Sun ◽  
Dandan Wang ◽  
Yingying Fan ◽  
Liansheng Jiao ◽  
Fenghua Li ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Concentration Gradient ◽  
High Capacity ◽  
Lithium Ion ◽  
Precipitation Method ◽  
Co Precipitation

A novel high capacity cathode material with a full concentration-gradient (FCG) structure has been successfully synthesized by a modified hydroxide co-precipitation method.

Industrialization of tailoring spherical cathode material towards high-capacity, cycling-stable and superior low temperature performance for lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 97818-97824 ◽  
Author(s):  
Zhonghui Sun ◽  
Liansheng Jiao ◽  
Yingying Fan ◽  
Fenghua Li ◽  
Dandan Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
High Capacity ◽  
Lithium Ion ◽  
Precipitation Method ◽  
Temperature Performance ◽  
Different Types ◽  
Co Precipitation

Three different types of spherical cathodes (Li[Ni0.6Co0.2Mn0.2]O2) were synthesized via hydroxide co-precipitation method coupled with high temperature lithiation process.

LiNi0.90Co0.07Mg0.03O2 cathode materials with Mg-concentration gradient for rechargeable lithium-ion batteries

2019 ◽  
Vol 7 (36) ◽  
pp. 20958-20964 ◽  
Author(s):  
Yudong Zhang ◽  
Hang Li ◽  
Junxiang Liu ◽  
Jicheng Zhang ◽  
Fangyi Cheng ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Concentration Gradient ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Gradient Structure ◽  
High Rate Capability

Nickel-rich LiNi0.90Co0.07Mg0.03O2 cathode material with concentration gradient structure exhibits superior high capacity, high-rate capability and cycling stability.

The Effect of Si Doping or/and Ti Coating on the Electrochemical Properties of Ni-Rich NCA (LiNi0.8Co0.15Al0.05O2) Cathode Material for Lithium-Ion Batteries

2020 ◽  
Vol 12 (10) ◽  
pp. 1581-1585
Author(s):  
Tae-Hyun Ha ◽  
Jun-Seok Park ◽  
Gyu-Bong Cho ◽  
Hyo-Jun Ahn ◽  
Ki-Won Kim ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Physical Contact ◽  
Precipitation Method ◽  
Si Doping

LiNixCoyAlzO2 (NCA) is one of the most promising candidates of cathode material for lithium ion batteries because of its high capacity, energy density, and low cost. However, Ni-rich NCA cathode materials suffer from side reaction (formation of lithium carbonate and hydrogen fluoride attack) between electrolyte and surface of electrode and irreversible phase transition leading to capacity fading and thermal instability. These problems could be improved by coating and doping of transition metal elements. Si doping contributes to stabilization of the unstable R-3m structure, and Ti coating is capable of prohibiting the direct physical contact of electrode with electrolyte. In this work, LiNi0.8Co0.15Al0.05O2 (NCA) cathode materials coated or/and doped by Ti and Si elements were fabricated by co-precipitation method using the ball-milling. The crystal structure, morphology and electrochemical properties are investigated using X-ray diffraction (XRD), scanning electron microscopy (FE-SEM), transmission electron microscopy (FE-TEM), and WBCS3000 (WonA tech Co., Ltd.). The EIS and charge/discharge results of Si doped and Ti coated NCA exhibited the lowest resistance value (147.19 Ω) and capacity retentions of 88% after 100 cycles at 0.5 C.

Sign in / Sign up

Export Citation Format

Share Document