Enhanced electrochemical capabilities of lithium ion batteries by structurally ideal AAO separator

Nanoporous anodic aluminium oxide (AAO) enables the direct utilization of lithium metal as an ideal anode, owing to a uniform current distribution. The electrochemical performance of the AAO separator is superior to commercial polypropylene, in terms of ionic conductivity, discharge capacity, and capacity fading.

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Effects of FEC Additive on the Low Temperature Performance of LiODFB-Based Lithium-Ion Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.724-725.1025 ◽

2013 ◽

Vol 724-725 ◽

pp. 1025-1028

Author(s):

Rong Xiang ◽

Fa Qiang Li ◽

Guo Feng Jia ◽

Zheng Jun Peng ◽

Qin Zhuge

Keyword(s):

Ionic Conductivity ◽

Low Temperature ◽

Lithium Ion Batteries ◽

Discharge Capacity ◽

Lithium Ion ◽

Electrochemical Measurements ◽

Temperature Performance ◽

Fluoroethylene Carbonate ◽

Low Temperature Performance

The low temperature performance of LiFePO4/Li cells based on lithium oxalyldifluoroborate (LiODFB) with fluoroethylene carbonate (FEC) as addictive have been investigated. The result of ionic conductivity test shows that the use of 5% FEC can improve the conductivity of both LiPF6and LiODFB electrolytes at low temperature. The electrochemical measurements of the cells show that the use of FEC can effectively improve the discharge capacity and has better kinetics characteristics and low temperature performance. The LiODFB cell with FEC also exhibits excellent cycling retention of 88.8% after 50 cycles at-20°C.

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Li2MnSiO4/C Composite with Ascorbic Acid as Carbon Source for Lithium Ion Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1033-1034.125 ◽

2014 ◽

Vol 1033-1034 ◽

pp. 125-128

Author(s):

Chun Yan Lai ◽

Zhen Wang ◽

Jia Jun Zhu ◽

Qun Jie Xu

Keyword(s):

Ascorbic Acid ◽

Carbon Source ◽

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Discharge Capacity ◽

Sol Gel ◽

Lithium Ion ◽

Gel Method ◽

Sol Gel Method

Ascorbic acid (VC) was used as carbon source for Li2MnSiO4/C composite synthesized by a sol-gel method. By comparing the electrochemical performance of the Li2MnSiO4/C composite and pure Li2MnSiO4, it was found that VC adding can improve the capacity of Li2MnSiO4. The Li2MnSiO4/C with 10% VC shows a discharge capacity of 212 mAh/g at 0.05C and Li2MnSiO4/C with 15% VC shows discharge capacity of 192 mAh/g at 0.1C, that were higher than the capacity of pure Li2MnSiO4.

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Effects of Li2MnO3 coating on the high-voltage electrochemical performance and stability of Ni-rich layer cathode materials for lithium-ion batteries

RSC Advances ◽

10.1039/c5ra26897d ◽

2016 ◽

Vol 6 (27) ◽

pp. 22625-22632 ◽

Cited By ~ 19

Author(s):

Honglong Zhang ◽

Bing Li ◽

Jing Wang ◽

Bihe Wu ◽

Tao Fu ◽

...

Keyword(s):

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Discharge Capacity ◽

High Voltage ◽

Cathode Materials ◽

Coating Layer ◽

Lithium Ion ◽

Capacity Retention ◽

Active Materials

The Li2MnO3-coated LiNi0.8Co0.1Mn0.1O2 shows a higher discharge capacity and a better capacity retention. The coating layer can protect the NCM active materials from CO2, suppressing the formation of Li2CO3 on the surface of NCM materials.

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High performance NiO microsphere anode assembled from porous nanosheets for lithium-ion batteries

RSC Advances ◽

10.1039/c5ra05659d ◽

2015 ◽

Vol 5 (61) ◽

pp. 49765-49770 ◽

Cited By ~ 20

Author(s):

Lihua Chu ◽

Meicheng Li ◽

Xiaodan Li ◽

Yu Wang ◽

Zipei Wan ◽

...

Keyword(s):

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Lithium Ion Battery ◽

Discharge Capacity ◽

High Performance ◽

Lithium Ion ◽

Porous Nanosheets ◽

Excellent Electrochemical Performance ◽

Rate Capacity

3D NiO microspheres assembled from porous nanosheets were fabricated, showing an excellent electrochemical performance in a lithium ion battery (reversible discharge capacity: up to 820 mA h g−1 after 100 cycles at 100 mA g−1; rate capacity: 634 mA h g−1 at 1 A g−1).

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A new organic–inorganic hybrid electrolyte based on polyacrylonitrile, polyether diamine and alkoxysilanes for lithium ion batteries: synthesis, structural properties, and electrochemical characterization

RSC Advances ◽

10.1039/c3ra47695b ◽

2014 ◽

Vol 4 (26) ◽

pp. 13293-13303 ◽

Cited By ~ 9

Author(s):

Yu-Chi Pan ◽

Diganta Saikia ◽

Jason Fang ◽

Li-Duan Tsai ◽

George T. K. Fey ◽

...

Keyword(s):

Ionic Conductivity ◽

Lithium Ion Batteries ◽

Structural Properties ◽

Discharge Capacity ◽

Lithium Ion ◽

Electrochemical Characterization ◽

Initial Discharge Capacity ◽

Inorganic Hybrid ◽

Initial Discharge

The plasticized hybrid electrolyte exhibits a maximum ionic conductivity of 6.4 mS cm−1 at 30 °C and an initial discharge capacity of 123 mA h g−1 in battery testing.

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Na+ and Zr4+ co-doped Li4Ti5O12 as anode materials with superior electrochemical performance for lithium ion batteries

RSC Advances ◽

10.1039/c6ra16717a ◽

2016 ◽

Vol 6 (93) ◽

pp. 90455-90461 ◽

Cited By ~ 13

Author(s):

Peng Lu ◽

Xiaobing Huang ◽

Yurong Ren ◽

Jianning Ding ◽

Haiyan Wang ◽

...

Keyword(s):

Solid State ◽

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Discharge Capacity ◽

Solid State Reaction ◽

Anode Materials ◽

Rate Capability ◽

Lithium Ion ◽

Co Doped

Na+ and Zr4+ co-doped lithium titanates were successfully synthesized via a solid-state reaction in air. Particularly, Li3.97Na0.03Ti4.97Zr0.03O12 exhibits the best rate capability. Even at 20C, it delivers a discharge capacity of 140 mA h g−1.

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Synthesis and Electrochemical Properties of β-LiVOPO4/C as Cathode Materials for Lithium-Ion Batteries

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4048938 ◽

2020 ◽

Vol 18 (3) ◽

Author(s):

Hualing Tian ◽

Zhonggang Liu ◽

Yanjun Cai ◽

Zhi Su

Keyword(s):

Ionic Conductivity ◽

Lithium Ion Batteries ◽

Discharge Capacity ◽

Cathode Materials ◽

Lithium Ion ◽

Commercial Application ◽

Initial Discharge Capacity ◽

A Value ◽

Initial Discharge ◽

High Theoretical Capacity

Abstract Due to the high theoretical capacity, high platform voltage, stable structure, and mild conditions for synthesis, LiVOPO4 is expected to become the next generation of cathode materials for lithium-ion batteries (LIBs). However, due to the relatively weak ionic conductivity, its commercial application has been largely limited. The paper reported that acetylene black was used as the reducing agent and the pure phase nanostructured orthorhombic β-LiVOPO4 was obtained by carbothermal reduction method. A significant improvement in ionic conductivity was achieved, and the results were compared with previous studies, the initial discharge capacity of the material was considerably enhanced. The results show that the electrical conductivity and the initial discharge capacity of the material were also significantly improved. The sample obtained by holding at 600 °C for 10 h exhibited a maximum discharge capacity of 141.4 mAh g−1 between 3 V and 4.5 V at 0.05 C, with a value of 136.3 mAh g−1, retained after 50 cycles. This represents capacity retention of 96.39%.

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High Temperature Resistant Separator of PVDF-HFP/DBP/C-TiO2 for Lithium-Ion Batteries

Materials ◽

10.3390/ma12172813 ◽

2019 ◽

Vol 12 (17) ◽

pp. 2813 ◽

Cited By ~ 9

Author(s):

Haijuan Li ◽

Ling Li ◽

Shuaizhi Zheng ◽

Xinming Wang ◽

Zengsheng Ma

Keyword(s):

Titanium Dioxide ◽

Ionic Conductivity ◽

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Room Temperature ◽

Lithium Ion ◽

Inversion Method ◽

Tio2 Nanofibers ◽

Electrolyte Uptake ◽

Composite Separator

To improve the thermal shrinkage and ionic conductivity of the separator for lithium-ion batteries, adding carboxylic titanium dioxide nanofiber materials into the matrix is proposed as an effective strategy. In this regard, a poly(vinylidene fluoride-hexafluoro propylene)/dibutyl phthalate/carboxylic titanium dioxide (PVDF-HFP/DBP/C-TiO2) composite separator is prepared with the phase inversion method. When the content of TiO2 nanofibers reaches 5%, the electrochemical performance of the battery and ion conductivity of the separator are optimal. The PVDF-HFP/DBP/C-TiO2 (5%) composite separator shows about 55.5% of porosity and 277.9% of electrolyte uptake. The PVDF-HFP/DBP/C-TiO2 (5%) composite separator has a superior ionic conductivity of 1.26 × 10 −3 S cm−1 and lower interface impedance at room temperature, which brings about better cycle and rate performance. In addition, the cell assembled with a PVDF-HFP/DBP/C-TiO2 separator can be charged or discharged normally and has an outstanding discharge capacity of about 150 mAh g−1 at 110 °C. The battery assembled with the PVDF-HFP/DBP/C-TiO2 composite separator exhibits excellent electrochemical performance under high and room temperature environments.

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