Electrochemical performance of Li3V2(PO4)3/C cathode materials using stearic acid as a carbon source

2011 ◽  
Vol 56 (5) ◽  
pp. 2269-2275 ◽  
Author(s):  
Y.Q. Qiao ◽  
X.L. Wang ◽  
J.Y. Xiang ◽  
D. Zhang ◽  
W.L. Liu ◽  
...  
Keyword(s):  
Carbon Source ◽  
Stearic Acid ◽  
Electrochemical Performance ◽  
Cathode Materials

scholarly journals Rapid mechanochemical synthesis of polyanionic cathode with improved electrochemical performance for Na-ion batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xing Shen ◽  
Quan Zhou ◽  
Miao Han ◽  
Xingguo Qi ◽  
Bo Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Mechanochemical Synthesis ◽  
Cathode Materials ◽  
Industrial Application ◽  
Synthesis Process ◽  
In Situ Fabrication ◽  
Stationary Energy ◽  
Carbon Coated

AbstractNa-ion batteries have been considered promising candidates for stationary energy storage. However, their wide application is hindered by issues such as high cost and insufficient electrochemical performance, particularly for cathode materials. Here, we report a solvent-free mechanochemical protocol for the in-situ fabrication of sodium vanadium fluorophosphates. Benefiting from the nano-crystallization features and extra Na-storage sites achieved in the synthesis process, the as-prepared carbon-coated Na3(VOPO4)2F nanocomposite exhibits capacity of 142 mAh g−1 at 0.1C, higher than its theoretical capacity (130 mAh g−1). Moreover, a scaled synthesis with 2 kg of product was conducted and 26650-prototype cells were demonstrated to proof the electrochemical performance. We expect our findings to mark an important step in the industrial application of sodium vanadium fluorophosphates for Na-ion batteries.

scholarly journals Polyimide-Derived Carbon-Coated Li4Ti5O12 as High-Rate Anode Materials for Lithium Ion Batteries

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1672
Author(s):  
Shih-Chieh Hsu ◽  
Tzu-Ten Huang ◽  
Yen-Ju Wu ◽  
Cheng-Zhang Lu ◽  
Huei Chu Weng ◽  
...  
Keyword(s):  
Carbon Source ◽  
Electrochemical Performance ◽  
Anode Materials ◽  
Lithium Ion ◽  
High Rate ◽  
Rate Performance ◽  
Molecular Arrangement ◽  
Thermal Imidization ◽  
Carbon Coated ◽  
Graphite Structure

Carbon-coated Li4Ti5O12 (LTO) has been prepared using polyimide (PI) as a carbon source via the thermal imidization of polyamic acid (PAA) followed by a carbonization process. In this study, the PI with different structures based on pyromellitic dianhydride (PMDA), 4,4′-oxydianiline (ODA), and p-phenylenediamine (p-PDA) moieties have been synthesized. The effect of the PI structure on the electrochemical performance of the carbon-coated LTO has been investigated. The results indicate that the molecular arrangement of PI can be improved when the rigid p-PDA units are introduced into the PI backbone. The carbons derived from the p-PDA-based PI show a more regular graphite structure with fewer defects and higher conductivity. As a result, the carbon-coated LTO exhibits a better rate performance with a discharge capacity of 137.5 mAh/g at 20 C, which is almost 1.5 times larger than that of bare LTO (94.4 mAh/g).

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