scholarly journals Understanding Fluoroethylene Carbonate and Vinylene Carbonate Based Electrolytes for Si Anodes in Lithium Ion Batteries with NMR Spectroscopy

2018 ◽  
Vol 140 (31) ◽  
pp. 9854-9867 ◽  
Author(s):  
Yanting Jin ◽  
Nis-Julian H. Kneusels ◽  
Lauren E. Marbella ◽  
Elizabeth Castillo-Martínez ◽  
Pieter C. M. M. Magusin ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Vinylene Carbonate ◽  
Fluoroethylene Carbonate ◽  
Si Anodes

Scalable Synthesis of Hollow β-SiC/Si Anodes via Selective Thermal Oxidation for Lithium-Ion Batteries

ACS Nano ◽  
2020 ◽  
Vol 14 (9) ◽  
pp. 11548-11557
Author(s):  
Seungkyu Park ◽  
Jaekyung Sung ◽  
Sujong Chae ◽  
Jaehyung Hong ◽  
Taeyong Lee ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Thermal Oxidation ◽  
Lithium Ion ◽  
Si Anodes ◽  
Scalable Synthesis

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.

Managing voids of Si anodes in lithium ion batteries

Nanoscale ◽  
2013 ◽  
Vol 5 (19) ◽  
pp. 8864 ◽  
Author(s):  
Xianglong Li ◽  
Linjie Zhi
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Si Anodes

scholarly journals A conductive self healing polymeric binder using hydrogen bonding for Si anodes in lithium ion batteries

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jaebin Nam ◽  
Eunsoo Kim ◽  
Rajeev K.K. ◽  
Yeonho Kim ◽  
Tae-Hyun Kim
Keyword(s):  
Hydrogen Bonding ◽  
Acrylic Acid ◽  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Polymer Binder ◽  
Self Healing ◽  
Si Anodes ◽  
Ion Conducting ◽  
Poly Acrylic Acid

Abstract A ureido-pyrimidinone (UPy)-functionalized poly(acrylic acid) grafted with poly(ethylene glycol)(PEG), designated PAU-g-PEG, was developed as a high performance polymer binder for Si anodes in lithium-ion batteries. By introducing both a ureido-pyrimidinone (UPy) unit, which is capable of self-healing through dynamic hydrogen bonding within molecules as well as with Si, and an ion-conducting PEG onto the side chain of the poly(acrylic acid), this water-based self-healable and conductive polymer binder can effectively accommodate the volume changes of Si, while maintaining electronic integrity, in an electrode during repeated charge/discharge cycles. The Si@PAU-g-PEG electrode retained a high capacity of 1,450.2 mAh g−1 and a Coulombic efficiency of 99.4% even after 350 cycles under a C-rate of 0.5 C. Under a high C-rate of 3 C, an outstanding capacity of 2,500 mAh g−1 was also achieved, thus demonstrating its potential for improving the electrochemical performance of Si anodes.

High performance polymer binders inspired by chemical finishing of textiles for silicon anodes in lithium ion batteries

2017 ◽  
Vol 5 (42) ◽  
pp. 22156-22162 ◽  
Author(s):  
Liangming Wei ◽  
Zhongyu Hou
Keyword(s):  
Lithium Ion Batteries ◽  
Carboxymethyl Cellulose ◽  
High Performance ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Silicon Anodes ◽  
Polymer Binders ◽  
High Performance Polymer ◽  
Si Anodes

Inspired by the chemical finishing method for textile, theN-methylol acrylamide functionalized carboxymethyl cellulose binder has been developed for Si anodes. This binder can help maintain integration of the Si electrodes, leading to significant improvement in cycling performance of the Si based lithium ion batteries.

Si nanoflake-assembled blocks towards high initial coulombic efficiency anodes for lithium-ion batteries

2018 ◽  
Vol 54 (86) ◽  
pp. 12214-12217 ◽  
Author(s):  
Xiangyang Zhou ◽  
Yongpeng Ren ◽  
Juan Yang ◽  
Jing Ding ◽  
Jiaming Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Si Anodes ◽  
Initial Coulombic Efficiency

The initial coulombic efficiency of Si anodes is effectively improved via a Cu assisted Mg reduction.

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