title: Flexible pillared graphene-paper electrodes for high-performance electrochemical supercapacitors.
abstract: Flexible graphene paper (GP) pillared by carbon black (CB) nanoparticles using a simple vacuum filtration method is developed as a high-performance electrode material for supercapacitors. Through the introduction of CB nanoparticles as spacers, the self-restacking of graphene sheets during the filtration process is mitigated to a great extent. The pillared GP-based supercapacitors exhibit excellent electrochemical performances and cyclic stabilities compared with GP without the addition of CB nanoparticles. At a scan rate of 10 mV s(-1) , the specific capacitance of the pillared GP is 138 F g(-1)  and 83.2 F g(-1)  with negligible 3.85% and 4.35% capacitance degradation after 2000 cycles in aqueous and organic electrolytes, respectively. At an extremely fast scan rate of 500 mV s (-1) , the specific capacitance can reach 80 F g(-1)  in aqueous electrolyte. No binder is needed for assembling the supercapacitor cells and the pillared GP itself may serve as a current collector due to its intrinsic high electrical conductivity. The pillared GP has great potential in the development of promising flexible and ultralight-weight supercapacitors for electrochemical energy storage.
authors.affiliation: Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education, Northeastern University, Shenyang, Liaoning 110004, China.
authors.forename: Gongkai
authors.initials: G
authors.lastname: Wang
authors.forename: Xiang
authors.initials: X
authors.lastname: Sun
authors.forename: Fengyuan
authors.initials: F
authors.lastname: Lu
authors.forename: Hongtao
authors.initials: H
authors.lastname: Sun
authors.forename: Mingpeng
authors.initials: M
authors.lastname: Yu
authors.forename: Weilin
authors.initials: W
authors.lastname: Jiang
authors.forename: Changsheng
authors.initials: C
authors.lastname: Liu
authors.forename: Jie
authors.initials: J
authors.lastname: Lian