title: A High-Performance Lithium-Ion Capacitor Based on 2D Nanosheet Materials.
abstract: Lithium-ion capacitors (LICs) are promising electrical energy storage systems for mid-to-large-scale applications due to the high energy and large power output without sacrificing long cycle stability. However, due to the different energy storage mechanisms between anode and cathode, the energy densities of LICs often degrade noticeably at high power density, because of the sluggish kinetics limitation at the battery-type anode side. Herein, a high-performance LIC by well-defined ZnMn2O4-graphene hybrid nanosheets anode and N-doped carbon nanosheets cathode is presented. The 2D nanomaterials offer high specific surface areas in favor of a fast ion transport and storage with shortened ion diffusion length, enabling fast charge and discharge. The fabricated LIC delivers a high specific energy of 202.8 Wh kg-1at specific power of 180 W kg-1, and the specific energy remains 98 Wh kg-1even when the specific power achieves as high as 21 kW kg-1.
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Shaohui
authors.initials: S
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Jingwei
authors.initials: J
authors.lastname: Chen
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Mengqi
authors.initials: M
authors.lastname: Cui
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Guofa
authors.initials: G
authors.lastname: Cai
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Jiangxin
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Peng
authors.initials: P
authors.lastname: Cui
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Xuefei
authors.initials: X
authors.lastname: Gong
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Pooi See
authors.initials: PS
authors.lastname: Lee
keywords: 2D materials; energy storage; lithium-ion capacitor; nanosheets