Engineering Ultrathin Carbon Layer on Porous Hard Carbon Boosts Sodium Storage with High Initial Coulombic Efficiency

Cheng, Dejian1,2,3; Li, Zhenghui3; Zhang, Minglu3; Duan, Zhihua3; Wang, Jun4; Wang, Chaoyang1,2

2023-09-01

10.1021/acsnano.3c04984

ACS NANO   影响因子和分区

1936-0851

1936-086X

Hard carbon (HC) has been widely adopted as the anode material for sodium ion batteries (NIBs). However, it is troubled by a low initial Coulombic efficiency (ICE) due to its porous structure. Herein, a graphitized and ultrathin carbon layer coating on HC is proposed to solve this challenge. The as-prepared porous carbon material coated with an ultrathin carbon layer composite (PCS@V@C) exhibits a cavity structure, which is prepared by using bis(cyclopentadienyl) nickel (CP-Ni) as the carbon source for outer coating, glucose carbon spheres as porous carbon, and introducing a silica layer to facilitate the coating process. When utilized as the anode for NIBs, the material shows an ICE increase from 47.1% to 85.3%, and specific capacity enhancement at 0.1 A g(-1) from 155.3 to 216.7 mA h g(-1). Moreover, its rate capability and cycling performance are outstanding, demonstrating a capacity of 140.3 mA h g(-1) at 10 A g(-1), and a retaining capacity of 225.6 mA h g(-1) after 300 cycles at 0.1 A g(-1) with the Coulombic efficiency of 100% at the second cycle. The excellent electrochemical performance of the PCS@V@C is attributed to the ultrathin carbon layer, which is beneficial for the formation of a stable solid electrolyte interphase (SEI) film. Therefore, this study provides a feasible surface modification method for the preparation of anode materials for NIBs with high specific capacity and ICE.

sodium ion batteries hard carbon initialCoulombic efficiency ultrathin carbon layer surfacemodification

SCI ; EI

英语

NI论文

通讯

National Natural Science Foundation of China["22275059","52371225"] ; Science and Technology Planning Project of Guangdong Province[2021A0505110001]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001071388900001

AMER CHEMICAL SOC

20234314971732

Anodes ; Carbon ; Ice ; Metal ions ; Nickel coatings ; Porous materials ; Silica ; Sodium-ion batteries ; Solid electrolytes

Metallurgy:531.1 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Coating Materials:813.2 ; Production Engineering:913.1 ; Materials Science:951

Web of Science

1.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Peoples R China
2.South China Univ Technol, Key Lab Polymer Proc Engn, Minist Educ, Guangzhou 510640, Peoples R China
3.Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China
4.Southern Univ Sci & Technol, Sch Innovat & Entrepreneurship, Shenzhen 518055, Peoples R China

Cheng, Dejian,Li, Zhenghui,Zhang, Minglu,et al. Engineering Ultrathin Carbon Layer on Porous Hard Carbon Boosts Sodium Storage with High Initial Coulombic Efficiency[J]. ACS NANO,2023,17(19):19063-19075.

Cheng, Dejian,Li, Zhenghui,Zhang, Minglu,Duan, Zhihua,Wang, Jun,&Wang, Chaoyang.(2023).Engineering Ultrathin Carbon Layer on Porous Hard Carbon Boosts Sodium Storage with High Initial Coulombic Efficiency.ACS NANO,17(19),19063-19075.

Cheng, Dejian,et al."Engineering Ultrathin Carbon Layer on Porous Hard Carbon Boosts Sodium Storage with High Initial Coulombic Efficiency".ACS NANO 17.19(2023):19063-19075.