Monoclinic Li3V2(PO4)3/C nanocrystals co-modified with graphene nanosheets and carbon nanotubes as a three-dimensional-network cathode material for rechargeable lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (10) ◽  
pp. 8431-8439 ◽  
Author(s):  
Kai Cui ◽  
Yongkui Li
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Graphene Nanosheets ◽  
Sol Gel ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Graphene Nanosheet ◽  
Dimensional Network

A graphene nanosheet and carbon nanotube co-modified Li3V2(PO4)3/C composite has been first prepared via a hydrothermal-assisted sol–gel method.

Superior electrochemical performance of a novel LiFePO4/C/CNTs composite for aqueous rechargeable lithium-ion batteries

2020 ◽  
Vol 22 (4) ◽  
pp. 1953-1962 ◽  
Author(s):  
Wenyuan Duan ◽  
Mingshu Zhao ◽  
Yusuke Mizuta ◽  
Yanlin Li ◽  
Tong Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Sol Gel ◽  
Lithium Ion ◽  
Gel Method ◽  
Sol Gel Method

Olivine LiFePO4 covered flocculent carbon layers wrapped with carbon nanotubes (CNTs) prepared by sol–gel method and calcination is used as the cathode material for aqueous rechargeable lithium-ion batteries (ARLBs).

scholarly journals Synthesis of LiFePO4/Graphene Nanocomposite and Its Electrochemical Properties as Cathode Material for Li-Ion Batteries

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Xiaoling Ma ◽  
Gongxuan Chen ◽  
Qiong Liu ◽  
Guoping Zeng ◽  
Tian Wu
Keyword(s):  
Cathode Material ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Graphene Nanosheets ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Phase Method ◽  
Graphene Nanocomposite ◽  
Li Ion ◽  
Planar Graphene

LiFePO4/graphene nanocomposite was successfully synthesized by rheological phase method and its electrochemical properties as the cathode materials for lithium ion batteries were measured. As the iron source in the synthesis, FeOOH nanorods anchored on graphene were first synthesized. The FeOOH nanorods precursors and the final LiFePO4/graphene nanocomposite products were characterized by XRD, SEM, and TEM. While the FeOOH precursors were nanorods with 5–10 nm in diameter and 10–50 nm in length, the LiFePO4were nanoparticles with 20–100 nm in size. Compared with the electrochemical properties of LiFePO4particles without graphene nanosheets, it is clear that the graphene nanosheets can improve the performances of LiFePO4as the cathode material for lithium ion batteries. The as-synthesized LiFePO4/graphene nanocomposite showed high capacities and good cyclabilities. When measured at room temperature and at the rate of 0.1C(1C = 170 mA g−1), the composite showed a discharge capacity of 156 mA h g−1in the first cycle and a capacity retention of 96% after 15 cycles. The improved performances of the composite are believed to be the result of the three-dimensional conducting network formed by the flexible and planar graphene nanosheets.

Investigation on Structure and Electrochemical Properties of Li[Ni1/3Co1/3Mn1/3]O2 for Lithium Ion Batteries

2007 ◽  
Vol 336-338 ◽  
pp. 455-458
Author(s):  
Xiu Juan Shi ◽  
Yong Ping Zheng ◽  
Fei Yu Kang ◽  
Xin Lu Li ◽  
Wan Ci Shen
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Sol Gel ◽  
Lithium Ion ◽  
Hexagonal Structure ◽  
Oxidation States ◽  
Potential Range ◽  
Xps Analysis ◽  
Electrochemical Behaviors ◽  
Charge Discharge

Cathode material Li[Ni1/3Co1/3Mn1/3]O2 for lithium-ion batteries with layered hexagonal structure was successfully synthesized in sol-gel way. The influences of calcination temperature (from 700° to 1000°C) on the structure and electrochemical behaviors of Li[Ni1/3Co1/3Mn1/3]O2 were extensively investigated. The results of XRD show that all samples are isostructural with α-NaFeO2 with a space group R-3m. XPS analysis shows that the oxidation states of Co and Mn were Co3+ and Mn4+ respectively, while Ni exists as Ni2+ and Ni3+. The charge-discharge experiments show that the sample calcined at 850°C delivers 194.8mAh/g in the first cycle at C/5 rate in 2.5-4.3V potential range.

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