Pseudocapacitive TiNb2O7/reduced graphene oxide nanocomposite for high-rate lithium ion hybrid capacitors

Show simple item record Li, Yang Wang, Yan Cai, Rui Yu, Cuiping Zhang, Jianfang Wu, Jingjie Tiwary, Chandra Sekhar Cui, Jiewu Zhang, Yong Wu, Yucheng,
dc.coverage.spatial United States of America 2022-01-07T05:41:18Z 2022-01-07T05:41:18Z 2022-03
dc.identifier.citation Li, Yang; Wang, Yan; Cai, Rui; Yu, Cuiping; Zhang, Jianfang; Wu, Jingjie; Tiwary, Chandra Sekhar; Cui, Jiewu; Zhang, Yong and Wu, Yucheng, “Pseudocapacitive TiNb2O7/reduced graphene oxide nanocomposite for high–rate lithium ion hybrid capacitors”, Journal of Colloid and Interface Science, DOI: 10.1016/j.jcis.2021.12.057, vol. 610, pp. 385-394, Mar. 2022. en_US
dc.identifier.issn 0021-9797
dc.identifier.issn 1095-7103
dc.description.abstract Lithium ion hybrid capacitors (LIHCs) have a capacitor-type cathode and a battery-type anode and are a prospective energy storage device that delivers high energy/power density. However, the kinetic imbalance between the cathode and the anode is a key obstacle to their further development and application. Herein, we prepared TiNb2O7 nanoparticles through a facile solvothermal method and annealing treatment. Then a homogeneous three-dimensional (3D) self-supported reduced graphene oxide (rGO)-coated TiNb2O7 (TiNb2O7/rGO) nanocomposite was constructed by freeze-drying, followed by a high-temperature reduction, which demonstrates an enhanced pseudocapacitive lithium ions storage performance. Benefiting from the improved electrical conductivity, ultrashort ions diffusion paths, and 3D architecture, the TiNb2O7/rGO nanocomposite exhibits a high specific capacity of 285.0 mA h g−1, excellent rate capability (73.6% capacity retention at 8 A g−1), and superior cycling stability. More importantly, quantitative kinetics analysis reflects that the capacity of TiNb2O7/rGO is mainly dominated by capacitive behavior, making it perfectly match with the capacitor-type activated carbon (AC) cathode. By using pre-lithiated TiNb2O7/rGO as anode material and AC as cathode material, a high-rate TiNb2O7/rGO//AC LIHC device can be fabricated, which delivers an ultrahigh energy density of 127 Wh kg−1 at the power density of 200 W kg−1, a maximum power density of 10 kW kg−1 at the energy density of 56.4 Wh kg−1, and durable service life.
dc.description.statementofresponsibility by Yang Li ,Yan Wanga,Rui Cai , Cuiping Yu, Jianfang Zhang , Jingjie Wu , Chandra S. Tiwary ,Jiewu Cui , Yong Zhang ,Yu cheng
dc.format.extent vol. 610, pp. 385-394
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject TiNb2O7/rGO nanocomposite en_US
dc.subject Pseudocapacitive characteristics en_US
dc.subject Electrical conductivity en_US
dc.subject Rate performance en_US
dc.subject Lithium ion hybrid capacitor en_US
dc.title Pseudocapacitive TiNb2O7/reduced graphene oxide nanocomposite for high-rate lithium ion hybrid capacitors en_US
dc.type Article en_US
dc.relation.journal Journal of Colloid and Interface Science

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