Polyimide-cellulose interaction in Sb anode enables fast charging lithium-ion battery application
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Antimony-based electrodes are promising as fast charging anodes for lithium-ion batteries because their operating potential is about 0.8 V vs. Li/Li+, far away from the plating potential of Li. However, their capacity decays fast due to large volume expansion, the issue which has often been addressed through the use of nano-sized materials. Herein, we utilize an ion-dipole interaction between polyimide and carboxymethyl cellulose which suppresses particle cracking and holds the particle together to enable antimony anodes utilizing micron-sized Sb particles for high rate applications. Sb anode with 9.4% polyimide coating exhibits a high reversible capacity of 580 mAh g−1 at 1 A g−1 with excellent cycle performance. The rate performance of the electrode can be further improved by adding 5% acetylene black during the polyimide coating process. Even at a current rate of 20 C (13.2 A g−1), a highly reversible capacity of 380 mAh g−1 can be obtained. The superior high-rate capability and excellent stability of Sb anodes are further verified by full-cell tests with LiFePO4 cathodes.
Wang , S , Lee , P-K , Yang , X , Rogach , A L , Armstrong , A R & Yu , D Y W 2018 , ' Polyimide-cellulose interaction in Sb anode enables fast charging lithium-ion battery application ' , Materials Today Energy , vol. 9 , pp. 295-302 . https://doi.org/10.1016/j.mtener.2018.06.007
Materials Today Energy
© 2018 Elsevier Ltd. All rights reserved. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.mtener.2018.06.007
DescriptionThe work described in this paper was supported by a General Research Fund (CityU 21202014) and the SFC/RGC Joint Research Scheme (X-CityU102/14) from the Research Grants Council of the Hong Kong Special Administrative Region, China and 2014_HK-Scot-0072 from the Scottish Funding Council.
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