title: Flexible asymmetric supercapacitors based on ultrathin two-dimensional nanosheets with outstanding electrochemical performance and aesthetic property.
abstract: Flexible asymmetric supercapacitors with excellent electrochemical performance and aesthetic property are realized by using ultrathin two-dimensional (2D) MnO2 and graphene nanosheets as cathode and anode materials, respectively. 2D MnO2 nanosheets (MSs) with a thickness of ca. 2 nm are synthesized with a soft template method for the first time, which achieve a high specific capacitance of 774 F g(-1) even after 10000 cycles. Asymmetric supercapacitors based on ultrathin MSs and graphene exhibit a very high energy density up to 97.2 Wh kg(-1) with no more than 3% capacitance loss after 10000 cycles in aqueous electrolyte. Most interestingly, we show that the energy storage device can have an aesthetic property. For instance, a "Chinese panda" supercapacitor is capable of lighting up a red light emitting diode. This work has another, quite different aspect that a supercapacitor is no longer a cold industry product, but could have the meaning of art.
authors.affiliation: Graduate School at Shenzhen, Tsinghua University, Shenzhen, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Shi
authors.forename: Chengjun
authors.initials: C
authors.lastname: Xu
authors.forename: Cheng
authors.initials: C
authors.lastname: Yang
authors.forename: Yanyi
authors.initials: Y
authors.lastname: Chen
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Liu
authors.forename: Feiyu
authors.initials: F
authors.lastname: Kang
mesh_terms: D025802:Electric Capacitance; D004553:Electric Conductivity; D011211:Electric Power Supplies; D004581:Electronics / Q000295:instrumentation*; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D004954:Esthetics; D006108:Graphite / Q000737:chemistry*; D008567:Membranes, Artificial; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure
chemical_list: D008567:Membranes, Artificial; D006108:Graphite