title: A flexible and high-voltage internal tandem supercapacitor based on graphene-based porous materials with ultrahigh energy density.
abstract: Pursuing higher working voltage and packaged energy density, an internal tandem supercapacitor has been successfully designed and fabricated based on graphene-based porous carbon hybrid material. Compared with the packaged energy density of 27.2 Wh kgcell (-1) and working voltage of 3.5 V using EMIMBF4 electrolyte for the conventional single-cell supercapacitor, the internal tandem device with the same material achieves a much higher working voltage of 7 V as well as a significantly improved energy density of 36.3 Wh kgcell (-1) (increased by 33%), which is also about 7 times of that of the state-of-art commercial supercapacitors. A flexible internal tandem device is also designed and fabricated and demonstrated similar excellent performance.
authors.affiliation: Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 300071, Tianjin, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Lu
authors.forename: Xi
authors.initials: X
authors.lastname: Yang
authors.forename: Long
authors.initials: L
authors.lastname: Zhang
authors.forename: Tengfei
authors.initials: T
authors.lastname: Zhang
authors.forename: Kai
authors.initials: K
authors.lastname: Leng
authors.forename: Yingpeng
authors.initials: Y
authors.lastname: Wu
authors.forename: Yi
authors.initials: Y
authors.lastname: Huang
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Ma
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Chen
keywords: flexible materials; graphene; high working voltage; internal tandem supercapacitor