title: A Novel Layered Sedimentary Rocks Structure of the Oxygen-Enriched Carbon for Ultrahigh-Rate-Performance Supercapacitors.
abstract: In this paper, gelatin as a natural biomass was selected to successfully prepare an oxygen-enriched carbon with layered sedimentary rocks structure, which exhibited ultrahigh-rate performance and excellent cycling stability as supercapacitors. The specific capacitance reached 272.6 F g(-1) at 1 A g(-1) and still retained 197.0 F g(-1) even at 100 A g(-1) (with high capacitance retention of 72.3%). The outstanding electrochemical performance resulted from the special layered structure with large surface area (827.8 m(2) g(-1)) and high content of oxygen (16.215 wt %), which effectively realized the synergistic effects of the electrical double-layer capacitance and pseudocapacitance. Moreover, it delivered an energy density of 25.3 Wh kg(-1) even with a high power density of 34.7 kW kg(-1) and ultralong cycling stability (with no capacitance decay even over 10,000 cycles at 2 A g(-1)) in a symmetric supercapacitor, which are highly desirable for their practical application in energy storage devices and conversion.
authors.affiliation: Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.
authors.forename: Lin-Lin
authors.initials: LL
authors.lastname: Zhang
authors.affiliation: Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.
authors.forename: Huan-Huan
authors.initials: HH
authors.lastname: Li
authors.affiliation: Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.
authors.forename: Yan-Hong
authors.initials: YH
authors.lastname: Shi
authors.affiliation: Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.
authors.forename: Chao-Ying
authors.initials: CY
authors.lastname: Fan
authors.affiliation: Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.
authors.forename: Xing-Long
authors.initials: XL
authors.lastname: Wu
authors.affiliation: Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.
authors.forename: Hai-Feng
authors.initials: HF
authors.lastname: Wang
authors.affiliation: Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.
authors.forename: Hai-Zhu
authors.initials: HZ
authors.lastname: Sun
authors.affiliation: Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.
authors.forename: Jing-Ping
authors.initials: JP
authors.lastname: Zhang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D025802:Electric Capacitance; D019015:Geologic Sediments / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*
chemical_list: D002244:Carbon; D010100:Oxygen
keywords: biomass; layered sedimentary rocks structure; oxygen-enriched; symmetric supercapacitor; ultrahigh-rate performance