S-Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO2 for Na+/Li+ Storage with High Capacity and Long-Time Stability

Chen, Changmiao1; Li, Pengchao1; Wang, Taihong2,3; Wang, Shuangyin2; Zhang, Ming1

2019-07-18

10.1002/smll.201902201

Small   影响因子和分区

1613-6810

1613-6829

Building a rechargeable battery with high capacity, high energy density, and long lifetime contributes to the development of novel energy storage devices in the future. Although carbon materials are very attractive anode materials for lithium-ion batteries (LIBs), they present several deficiencies when used in sodium-ion batteries (SIBs). The choice of an appropriate structural design and heteroatom doping are critical steps to improve the capacity and stability. Here, carbon-based nanofibers are produced by sulfur doping and via the introduction of ultrasmall TiO2 nanoparticles into the carbon fibers (CNF-S@TiO2). It is discovered that the introduction of TiO2 into carbon nanofibers can significantly improve the specific surface area and microporous volume for carbon materials. The TiO2 content is controlled to obtain CNF-S@TiO2-5 to use as the anode material for SIBs/LIBs with enhanced electrochemical performance in Na+/Li+ storage. During the charge/discharge process, the S-doping and the incorporation of TiO2 nanoparticles into carbon fibers promote the insertion/extraction of the ions and enhance the capacity and cycle life. The capacity of CNF-S@TiO2-5 can be maintained at approximate to 300 mAh g(-1) over 600 cycles at 2 A g(-1) in SIBs. Moreover, the capacity retention of such devices is 94%, showing high capacity and good stability.

capacitive effect lithium-ion batteries (LIBs) sodium-ion batteries (SIBs) sulfur doping ultrasmall TiO2 nanoparticles

SCI ; EI

英语

其他

China Postdoctoral Science Foundation[2018T110822] ; China Postdoctoral Science Foundation[2017M610495]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000476303900001

WILEY-V C H VERLAG GMBH

20193107256652

Anodes ; Carbon fibers ; Carbon nanofibers ; Lithium compounds ; Lithium-ion batteries ; Metal ions ; Microporosity ; Microporous materials ; Nanoparticles ; Sodium compounds ; Sodium-ion batteries ; Storage (materials) ; Structural design ; Titanium dioxide

Structural Design, General:408.1 ; Metallurgy:531.1 ; Storage:694.4 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Solid State Physics:933

Web of Science

1.Hunan Univ, Sch Phys & Elect, Hunan Prov Key Lab Low Dimens Struct Phys & Devic, Key Lab Micro Nano Optoelect Devices,Minist Educ, Changsha 410082, Hunan, Peoples R China
2.Hunan Univ, Coll Chem & Chem Engn, Prov Hunan Key Lab Graphene Mat & Devices, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Chen, Changmiao,Li, Pengchao,Wang, Taihong,et al. S-Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO2 for Na+/Li+ Storage with High Capacity and Long-Time Stability[J]. Small,2019,15(38).

Chen, Changmiao,Li, Pengchao,Wang, Taihong,Wang, Shuangyin,&Zhang, Ming.(2019).S-Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO2 for Na+/Li+ Storage with High Capacity and Long-Time Stability.Small,15(38).

Chen, Changmiao,et al."S-Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO2 for Na+/Li+ Storage with High Capacity and Long-Time Stability".Small 15.38(2019).