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An Organic Solvent-free Approach towards PDI/carbon Cloth Composites as Flexible Lithium Ion Battery Cathodes

Chinese Journal of Polymer Science 2020年第5期38卷 540-549,I0008页

作者： Dong-Qing Wu Deng Lu Peng Yang Lie Ma Biao Jiang Xin Xi Fan-Cheng Meng Wen-Bei Zhang Fan Zhang Qian-Qian Zhong Rui-Li Liu School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai200240China School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

An acidic solution based method towards flexible lithium ion battery(LIB)cathodes is developed in this work with perylene diimide(PDI)as the electroactive component and carbon cloth(CC)as the current *** this approach,PDI is firstly dispersed in concentrated sulfuric acid(H2S04)and then deposited on CC substrate after the dilution of H2S04,which provides an organic solvent-free strategy to construct integrated LIB *** acdic solution based fabrication process also allows the facile adjusting of loading amounts of PDI in the cathodes,which can effectively influence the battery performances of the PDI/CC *** the result,the acidic solution processed PDI/CC cathode can deliver a high specific capacity of-36 mAh·g^-1 at the current density of 50 mA·g^-1 in both half cell with lithium foil as anode and full cell with pre-lithiated CC as *** both types of the batteries,the PDI/CC cathodes show good cycling stabilities by retaining^84%of the initial capacities after 300 charge-discharge cycles at 500 mA·g^-***,the excellent mechanical stability of the PDI/CC cathode enables the LIBs in pouch cell to maintain the electrochemical performances under various bending states,demonstrating their potentials for flexible LIBs.

关键词： Acidic solution processing Perylene diimide carbon clothes Organic cathodes Flexible lithium ion batteries

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Graphene quantum dots/Ni(OH)_(2) nanocomposites on carbon cloth as a binder-free electrode for supercapacitors

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Journal of Materials Science & Technology 2020年第23期58卷 73-79页

作者： Yiwen Hong Jingli Xu Jin Suk Chung Won Mook Choi School of Chemical Engineering University of Ulsan93 Daehak-ro Nam-guUlsan44610Republic of Korea College of Chemistry and Chemical Engineering Shanghai University of Engineering ScienceLongTeng Road 333201620ShanghaiPR China

Graphene quantum dots(GQDs)/Ni(OH)_(2) composites on carbon cloth(G-NH//CC) are prepared through simple hydrothermal reactions. The resulting G-NH//CC is employed as a binder-free electrode of supercapacitors. Due to the enhanced electrical conductivity and efficient ion transport by the addition of GQDs, the G-NH//CC electrode exhibits enhanced electrochemical performances. Specifically, the GNH//CC delivers a maximum specific capacitance of 1825 F g^(-1) at a current density of 1 A g^(-1) as well as a good cycle stability of 83.5 % capacity retention after 8000 cycles. Additionally, all-solid-state symmetric supercapacitor(SSC) is assembled with G-NH//CC composites as both positive and negative *** fabricated SSC exhibits a high energy density of 80.8 Wh kg^(-1)at a power density of 2021 W kg^(-1). The present study provides a facile and efficient strategy to prepare high-performance electrode materials for advanced electrochemical energy storage devices.

关键词： Graphene quantum dots Ni(OH)_(2) carbon clothes Symmetric supercapacitors

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