title: On-chip supercapacitors with ultrahigh volumetric performance based on electrochemically co-deposited CuO/polypyrrole nanosheet arrays.
abstract: We introduce a new method for fabricating unique on-chip supercapacitors based on CuO/polypyrrole core/shell nanosheet arrays by means of direct electrochemical co-deposition on interdigital-like electrodes. The prepared all-solid-state device demonstrates exceptionally high specific capacitance of 1275.5 F cm(-3) (∼40 times larger than that of CuO-only supercapacitors) and high-energy-density of 28.35 mWh cm(-3), which are both significantly greater than other solid-state supercapacitors. More importantly, the device maintains approximately 100% capacity retention at 2.5 A cm(-3) after 3000 cycles. The in situ co-deposition of CuO/polypyrrole nanosheets on interdigital substrate enables effective charge transport, electrode fabrication integrity, and device integration. Because of their high energy, power density, and stable cycling stability, these newly developed on-chip supercapacitors permit fast, reliable applications in portable and miniaturized electronic devices.
authors.affiliation: College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, No.1 Shizi Street, Suzhou 215006, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Qian
authors.forename: Jinqiu
authors.initials: J
authors.lastname: Zhou
authors.forename: Na
authors.initials: N
authors.lastname: Xu
authors.forename: Tingzhou
authors.initials: T
authors.lastname: Yang
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Shen
authors.forename: Xuejun
authors.initials: X
authors.lastname: Liu
authors.forename: Shishan
authors.initials: S
authors.lastname: Wu
authors.forename: Chenglin
authors.initials: C
authors.lastname: Yan