scholarly journals Au-doped Li1.2Ni0.7Co0.1Mn0.2O2 electrospun nanofibers: synthesis and enhanced capacity retention performance for lithium-ion batteries

RSC Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 4112-4118 ◽  
Author(s):  
Bin Yue ◽  
Xinlu Wang ◽  
Jinxian Wang ◽  
Jing Yao ◽  
Xinru Zhao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Electrospun Nanofibers ◽  
Electrochemical Performances ◽  
Retention Performance ◽  
Capacity Retention

Au-doped Li1.2Ni0.7Co0.1Mn0.2O2 nanofibers, which exhibit better electrochemical performances, were fabricated by controlling the cationic ratio of Au.

scholarly journals Application of PVDF Organic Particles Coating on Polyethylene Separator for Lithium Ion Batteries

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3125 ◽  
Author(s):  
Yuan Wang ◽  
Chuanqiang Yin ◽  
Zhenglin Song ◽  
Qiulin Wang ◽  
Yu Lan ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Polyvinylidene Fluoride ◽  
Retention Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Organic Polymer ◽  
Electrochemical Performances ◽  
Capacity Retention ◽  
Organic Particles ◽  
Surface Modified

Surface coating modification on a polyethylene separator serves as a promising way to meet the high requirements of thermal dimensional stability and excellent electrolyte wettability for lithium ion batteries (LIBs). In this paper, we report a new type of surface modified separator by coating polyvinylidene fluoride (PVDF) organic particles on traditional microporous polyethylene (PE) separators. The PE separator coated by PVDF particles (PE-PVDF separator) has higher porosity (61.4%), better electrolyte wettability (the contact angle to water was 3.28° ± 0.21°) and superior ionic conductivity (1.53 mS/cm) compared with the bare PE separator (51.2%, 111.3° ± 0.12°, 0.55 mS/cm). On one hand, the PVDF organic polymer has excellent organic electrolyte compatibility. On the other hand, the PVDF particles contain sub-micro spheres, of which the separator can possess a large specific surface area to absorb additional electrolyte. As a result, LIBs assembled using the PE-PVDF separator showed better electrochemical performances. For example, the button cell using a PE-PVDF as the separator had a higher capacity retention rate (70.01% capacity retention after 200 cycles at 0.5 C) than the bare PE separator (62.5% capacity retention after 200 cycles at 0.5 C). Moreover, the rate capability of LIBs was greatly improved as well—especially at larger current densities such as 2 C and 5 C.

Investigation of Lithium Difluoro (Sulfato) Borate as a Salt of Electrolyte for High-Temperature Lithium-Ion Batteries

2014 ◽  
Vol 953-954 ◽  
pp. 1049-1052 ◽  
Author(s):  
Shi You Li ◽  
Xiao Peng Li ◽  
Li Ping Mao ◽  
Xiao Ling Cui
Keyword(s):  
Lithium Ion Batteries ◽  
Dimethyl Carbonate ◽  
Ethylene Carbonate ◽  
Lithium Ion ◽  
Cycling Performance ◽  
The Novel ◽  
Retention Performance ◽  
Capacity Retention ◽  
And Storage ◽  
Discharge Capacities

Lthium difluoro (sulfato) borate (LiBF2SO4) is a prospecting salt for electrolyte of lithium-ion batteries. The effect of LiBF2SO4 salt on conductivity, charge-discharge capacities, temperature performance, cycling life and storage life at 60 °C is investigated. In graphite half cells at 60 °C, LiBF2SO4-ethylene carbonate (EC)/ dimethyl carbonate (DMC) electrolyte favourably facilitates the formation of a thermal stable, effective and conductive interface film on the surface of carbonaceous anode. Besides, in LiCoO2 half cells at 60 °C, the electrolyte containing the novel salt exerts several advantages, such as stable cycling performance, and good capacity retention performance.

FEC-LiTFSI-Pyr1ATFSI Ionic Liquid Electrolyte to Improve Low Temperature Performance of Lithium-Ion Batteries

2014 ◽  
Vol 986-987 ◽  
pp. 80-83
Author(s):  
Xiao Xue Zhang ◽  
Zhen Feng Wang ◽  
Cui Hua Li ◽  
Jian Hong Liu ◽  
Qian Ling Zhang
Keyword(s):  
Low Temperature ◽  
Lithium Ion Batteries ◽  
Low Temperatures ◽  
Freezing Point ◽  
Lithium Ion ◽  
Liquid Electrolyte ◽  
Capacity Retention ◽  
Composite Electrolyte ◽  
Ionic Liquid Electrolyte ◽  
Fluoroethylene Carbonate

N-methyl-N-allylpyrrolidinium bis (trifluoromethanesulfonyl) imide (PYR1ATFSI) with substantial supercooling behavior is synthesized to develop low temperature electrolyte for lithium-ion batteries. Additive fluoroethylene carbonate (FEC) in LiTFSI/PYR1ATFSI/EC/PC/EMC is found that it can reduce the freezing point. LiFePO4/Li coin cells with the FEC-PYR1ATFSI electrolyte exhibit good capacity retention, reversible cycling behavior at low temperatures. The good performance can be attributed to the decrease in the freezing point and the polarization of the composite electrolyte.

Influence of paper thickness on the electrochemical performances of graphene papers as an anode for lithium ion batteries

2013 ◽  
Vol 91 ◽  
pp. 227-233 ◽  
Author(s):  
Yuhai Hu ◽  
Xifei Li ◽  
Dongsheng Geng ◽  
Mei Cai ◽  
Ruying Li ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Electrochemical Performances
Sign in / Sign up

Export Citation Format

Share Document