title: Porous carbon derived from Sunflower as a host matrix for ultra-stable lithium-selenium battery.
abstract: A novel porous carbon material using the spongy tissue of sunflower as raw material is reported for the first time. The obtained porous carbon has an extremely high surface area of 2493.0m2g-1, which is beneficial to focus on encapsulating selenium in it and have an inhibiting effect about diffusion of polyselenides over the charge/discharge processes used as the host matrix for Li-Se battery. The porous carbon/Se composite electrode with 63wt% selenium delivers a high specific capacitance of 319mAhg-1of the initial capacity, and maintains 290mAhg-1, representing an extremely high capacity retention of 90.9% after 840 cycles with the rate of 1C.
authors.affiliation: Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China.
authors.forename: Min
authors.initials: M
authors.lastname: Jia
authors.affiliation: Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China.
authors.forename: Yubin
authors.initials: Y
authors.lastname: Niu
authors.affiliation: Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China.
authors.forename: Cuiping
authors.initials: C
authors.lastname: Mao
authors.affiliation: Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China.
authors.forename: Sangui
authors.initials: S
authors.lastname: Liu
authors.affiliation: Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China.
authors.forename: Shu-Juan
authors.initials: SJ
authors.lastname: Bao
authors.affiliation: Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology, Chongqing 400715, PR China. Electronic address: xumaowen@swu.edu.cn.
authors.forename: Maowen
authors.initials: M
authors.lastname: Xu
mesh_terms: D002244:Carbon / Q000737:chemistry*; D011211:Electric Power Supplies; D004566:Electrodes; D006368:Helianthus / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D016062:Porosity; D012643:Selenium / Q000737:chemistry*
chemical_list: D002244:Carbon; D008094:Lithium; D012643:Selenium
keywords: Capacity; High surface area; Li-Se battery; Porous carbon/Se composite; Stability