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Superlithiation of Non-conductive Polyimide toward High Performance Lithium Ion Batteries

Abstract

Superlithiation is observed in some carbonyl-based organic electrodes, which leads to a very high battery capacity. However, as a typical carbonyl polymer, polyimide (PI) exhibits a relatively low capacity (≤ 250 mAh g-1) in the previous reports because its poor electrical conductivity restricts the superlithiation. Therefore, in order to realize the superlithiation, in this work, multilayer graphene (MG) as conductive additives was incorporated into PI matrix through a blending precipitation and thermal imidization method. As an electrode in lithium-ion batteries, the PI-MG composite exhibits an outstanding capacity (612 mAh g-1 at 100 mA g-1) and stable long-term cyclability (89.3 % capacity retention over 500 cycles at 500 mA g-1). Moreover, the battery can be operated stably at various temperatures, and exhibits very high specific capacity, especially at high operating temperature of 55 °C (873 mAh g-1, 0.1C). We believe that this strategy by introducing conductive additives to promote the superlithiation is highly applicable to other non-conductive carbonyl polymers for lithium-ion battery applications.

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Publication details

The article was received on 31 May 2018, accepted on 04 Oct 2018 and first published on 05 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA05109G
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Superlithiation of Non-conductive Polyimide toward High Performance Lithium Ion Batteries

    H. Yang, S. Liu, L. Cao, S. Jiang and H. Hou, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05109G

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