Interfacial Reactions between Lithium and Grain Boundaries from Anatase TiO2–TUD-1 Electrodes in Lithium-Ion Batteries with Enhanced Capacity Retention

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.

Download Full-text

Preparation of anatase TiO2 with assistance of surfactant OP-10 and its electrochemical properties as an anode material for lithium ion batteries

Rare Metals ◽

10.1007/s12598-010-0157-5 ◽

2010 ◽

Vol 29 (5) ◽

pp. 505-510 ◽

Cited By ~ 5

Author(s):

Jin Yi ◽

Chunlin Tan ◽

Weishan Li ◽

Jianfei Lei ◽

Liansheng Hao

Keyword(s):

Electrochemical Properties ◽

Lithium Ion Batteries ◽

Anode Material ◽

Lithium Ion ◽

Anatase Tio2

Download Full-text

Anatase-TiO2/CNTs nanocomposite as a superior high-rate anode material for lithium-ion batteries

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2014.03.089 ◽

2014 ◽

Vol 603 ◽

pp. 144-148 ◽

Cited By ~ 17

Author(s):

Jinlong Liu ◽

Haibo Feng ◽

Jianbo Jiang ◽

Dong Qian ◽

Junhua Li ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Anode Material ◽

Lithium Ion ◽

Anatase Tio2 ◽

High Rate

Download Full-text

Electrochemical Behavior of NH4F-Pretreated Li1.25Ni0.20Fe0.13Co0.33Mn0.33O2 Cathodes for Lithium-ion Batteries

Applied Sciences ◽

10.3390/app10031021 ◽

2020 ◽

Vol 10 (3) ◽

pp. 1021

Author(s):

Yonglei Zheng ◽

Yikai Li ◽

He Wang ◽

Siheng Chen ◽

Xiangxin Guo ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Electrochemical Impedance ◽

Lithium Ion ◽

X Ray Diffraction ◽

Capacity Retention ◽

Hierarchical Microspheres ◽

Electrochemical Cycling ◽

Novel Method ◽

Diffraction Patterns ◽

Discharge Capacities

We report a novel method to fabricate lithium-ion batteries cathodes with the NH4F pretreatment. In this study, NH4F-pretreated Li1.25Ni0.20Fe0.13Co0.33Mn0.33O2 hollow nano-micro hierarchical microspheres were synthesized for use as cathode materials. The X-ray diffraction patterns of NH4F-pretreated Li1.25Ni0.20Co0.33Fe0.13Mn0.33O2 were analyzed with the RIETAN-FP software program, and the results showed that the samples possess a layered α-NaFeO2 structure. The effects of pretreatment with NH4F on the electrochemical performance of the pristine material were evaluated through charge/discharge cycling, the rate performance, and electrochemical impedance spectroscopy (EIS). Pretreatment with NH4F significantly improved the discharge capacities and coulombic efficiencies of Li1.25Ni0.20Co0.33Fe0.13Mn0.33O2 in the first cycle and during subsequent electrochemical cycling. The sample pretreated with an appropriate amount of NH4F (NFCM 90) showed the highest discharge capacity (209.1 mA h g−1) and capacity retention (85.2% for 50 cycles at 0.1 C). The EIS results showed that the resistance of the NFCM 90 sample (76.32 Ω) is lower than that of the pristine one (206.2 Ω).

Download Full-text

Microwave Synthesis of Nano-Sized SnO2 for Lithium-Ion Batteries

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.485.127 ◽

2011 ◽

Vol 485 ◽

pp. 127-130 ◽

Cited By ~ 2

Author(s):

Masashi Yoshinaga ◽

Norihito Kijima ◽

Sonoko Wakahara ◽

Junji Akimoto

Keyword(s):

Lithium Ion Batteries ◽

Crystallite Size ◽

Microwave Heating ◽

Microwave Synthesis ◽

Lithium Ion ◽

Lithium Insertion ◽

Capacity Retention

SnO2nanoparticles were successfully synthesized by the microwave heating. The crystallite size of the SnO2nanoparticles was estimated to be about 3 nm from the Scherre’s equation. The initial lithium insertion capacity of the SnO2nanoparticles was 2110 mAh/g which is larger than that of the micro-sized commercial SnO2product. The rechargeable capacity at 10 cycles was 1060 mAh/g, and the capacity retention over the tenth cycles was about 50 %.

Download Full-text