Phytic acid assisted formation of P-doped hard carbon anode with enhanced capacity and rate capability for lithium ion capacitors

2020 ◽  
Vol 474 ◽  
pp. 228500
Author(s):  
Zhewei Yang ◽  
Yuan Gao ◽  
Zhenxin Zhao ◽  
Yongzhen Wang ◽  
Yucheng Wu ◽  
...  
ChemSusChem ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 480-486 ◽  
Author(s):  
Dan Thien Nguyen ◽  
Alexander Hoefling ◽  
Minha Yee ◽  
Giang Thi Huong Nguyen ◽  
Patrick Theato ◽  
...  

2021 ◽  
Author(s):  
yitao lou ◽  
XianFa Rao ◽  
Jianjun Zhao ◽  
Jun Chen ◽  
Baobao Li ◽  
...  

In order to develop novel fast charge/discharge carbon anode materials, an organic hard carbon material (PTCDA-1100) is obtained by calcination of perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) at high temperature of 1100 oC....


RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75777-75781 ◽  
Author(s):  
Yi-Hung Liu ◽  
Sahori Takeda ◽  
Ikue Kaneko ◽  
Hideya Yoshitake ◽  
Masahiro Yanagida ◽  
...  

Vinylene carbonate induced film formation in a LiFePO4/hard carbon cell is clarified based on liquid chromatography mass spectroscopy and direct analysis in real time mass spectroscopy.


2017 ◽  
Vol 228 ◽  
pp. 251-258 ◽  
Author(s):  
Hongchuan Yu ◽  
Xiaoli Dong ◽  
Ying Pang ◽  
Yonggang Wang ◽  
Yongyao Xia

2018 ◽  
Vol 921 ◽  
pp. 105-110
Author(s):  
Yu Shiang Wu ◽  
Pei Rong Lyu

Technical developments of anode materials for lithium ion batteries have mainly focused on graphite (natural graphite, artificial graphite, and MCMB). Anode materials such as hard carbon, soft carbon, LTO, and Si-C are still under development. Hard carbon is produced by subjecting a polymer to thermal decomposition and carbonization, yielding nongraphitizable carbon. It exhibits structural stability, safety, and excellent performance at low temperature; moreover, batteries made of hard carbon have a long charge/discharge cycle life. Therefore, hard carbon is suitable for use in Li–ion batteries for electric cars that emphasize output power. This study developed a hard carbon anode by using phenolic resins that were ground to powders with a particle size (D50) of approximately 8 μm. Subsequently, the powders were heat treated at temperatures from 900°C to 1300°C for carbonization to reduce the specific surface area (SSA) of hard carbon. However, the SSA was determined to be still larger than that stipulated in commercial specifications. Therefore, this study coated the hard carbon with 1.5 wt.% poly (dimethyldiallylammonium chloride) and 1.5 wt.% poly (sodium-p-styrenesulfonate) to further reduce its SSA. The results indicated that 1st discharge capacity of the coated hard carbon was 330 mAhg−1. Its 1st irreversibility was reduced from 24.3% to 8.1% and SSA was reduced from 10.2 to 2.8 m2g−1; additionally, its coulombic efficiency after 20 cycles was over 99%. The cycle performance of the double-coated hard carbon at low temperature (-20°C) was improved, and it satisfies high C-rate (10 C) requirements.


EcoMat ◽  
2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Yan Li ◽  
Yi‐Feng Du ◽  
Guo‐Hua Sun ◽  
Jia‐Yao Cheng ◽  
Ge Song ◽  
...  

2018 ◽  
Vol 11 (06) ◽  
pp. 1830003 ◽  
Author(s):  
Ismaila El Moctar ◽  
Qiao Ni ◽  
Ying Bai ◽  
Feng Wu ◽  
Chuan Wu

Recent results have shown that sodium-ion batteries complement lithium-ion batteries well because of the low cost and abundance of sodium resources. Hard carbon is believed to be the most promising anode material for sodium-ion batteries due to the expanded graphene interlayers, suitable working voltage and relatively low cost. However, the low initial coulombic efficiency and rate performance still remains challenging. The focus of this review is to give a summary of the recent progresses on hard carbon for sodium-ion batteries including the impact of the uniqueness of carbon precursors and strategies to improve the performance of hard carbon; highlight the advantages and performances of the hard carbon. Additionally, the current problems of hard carbon for sodium-ion batteries and some challenges and perspectives on designing better hard-carbon anode materials are also provided.


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