A Hierarchical Si/C Nanocomposite of Stable Conductive Network Formed Through Thermal Phase Separation of Asphaltenes for High-Performance Li-Ion Batteries

Tan, Wen1; Wang, Lina1; Lu, Zhouguang1; Yang, Fan2; Xu, Zhenghe1,3

2022-08-01

10.1002/smll.202203102

Small   影响因子和分区

1613-6810

1613-6829

Silicon is one of the most promising anode materials for lithium-ion batteries. However, the huge volume change of silicon during lithiation/delithiation triggers continuous growth of solid-electrolyte interphase, loss of conductive contacts and structural collapse of the electrode, which causes a rapid deterioration of battery capacities. Inspired by the polyaromatic molecular nature and phase separation of asphaltenes in bitumen during thermal cracking, a hierarchical Si/C nanocomposite of robust carbon coatings and a firmly connected carbon framework on the silicon surface is synthesized by controlling the concentration of asphaltenes as carbon source and hence desired phase separation during the subsequent carbonization. The electrode made using this special Si/C nanocomposite exhibits a high reversible capacity of 1149 mAh g(-1) after 600 cycles with a capacity retention of 98.5% and the operation ability at a high mass loading over 10 mg cm(-2) or an area capacity of 23.8 mAh cm(-2), which represents one of the highest area capacities reported in open literature but with much more stable and prolonged operations. This simple and efficient strategy is easy to scale up for commercial production to meet the rapid growth of the electric vehicle industry.

hierarchical structures high-mass loading phase separation of asphaltenes Si C composites silicon anodes

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[21808101] ; Leading Talents of Guangdong Province Program[2016LJ06C536] ; Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials[ZDSYS20200421111401738] ; Research Foundation for Advanced Talents[20200207] ; Guangdong-Hong Kong-Macao Joint Laboratory[2019B121205001]

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

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

WOS:000836902600001

WILEY-V C H VERLAG GMBH

20223412622553

Anodes ; Carbon ; Carbonization ; Commercial vehicles ; Deterioration ; Lithium-ion batteries ; Nanocomposites ; Silicon ; Solid electrolytes

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Automobiles:662.1 ; Heavy Duty Motor Vehicles:663.1 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Solid State Physics:933 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Key Lab Interfacial Sci & Engn Mat, Key Univ Lab Highly Efficient Utilizat Solar Ener, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Shenzhen Technol Univ, Coll New Mat & New Energies, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Jiaxing Res Inst, Adv Mat Innovat Ctr, Jiaxing 314031, Peoples R China

Tan, Wen,Wang, Lina,Lu, Zhouguang,et al. A Hierarchical Si/C Nanocomposite of Stable Conductive Network Formed Through Thermal Phase Separation of Asphaltenes for High-Performance Li-Ion Batteries[J]. Small,2022,18.

Tan, Wen,Wang, Lina,Lu, Zhouguang,Yang, Fan,&Xu, Zhenghe.(2022).A Hierarchical Si/C Nanocomposite of Stable Conductive Network Formed Through Thermal Phase Separation of Asphaltenes for High-Performance Li-Ion Batteries.Small,18.

Tan, Wen,et al."A Hierarchical Si/C Nanocomposite of Stable Conductive Network Formed Through Thermal Phase Separation of Asphaltenes for High-Performance Li-Ion Batteries".Small 18(2022).