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Issue 42, 2018
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Superlithiation of non-conductive polyimide toward high-performance lithium-ion batteries

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Abstract

Superlithiation has been observed in some carbonyl-based organic electrodes, which leads to very high battery capacity. However, as typical carbonyl polymers, polyimides (PIs) exhibited a relatively low capacity (≤250 mA h g−1) in previous studies because their poor electrical conductivity restricts superlithiation. Therefore, to realize superlithiation, in this study, multilayer graphene (MG) as a conductive additive was incorporated in PI matrix through a blending precipitation and thermal imidization method. As an electrode in lithium-ion batteries, PI–MG exhibited outstanding capacity (612 mA h 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 could be operated stably at various temperatures, and it exhibited very high specific capacity, especially at the high operating temperature of 55 °C (873 mA h g−1, 0.1C). We believe that this strategy of introducing conductive additives to promote superlithiation is highly applicable to other non-conductive carbonyl polymers for lithium-ion battery applications.

Graphical abstract: Superlithiation of non-conductive polyimide toward high-performance lithium-ion batteries

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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, 2018,6, 21216-21224
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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, 6, 21216
    DOI: 10.1039/C8TA05109G

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