Macroporous Directed and Interconnected Carbon Architectures Endow Amorphous Silicon Nanodots as Low-Strain and Fast-Charging Anode for Lithium-Ion Batteries

Li，Zhenwei1,2; Han，Meisheng3; Yu，Peilun1; Lin，Junsheng1; Yu，Jie1,2

2024-12-01

10.1007/s40820-023-01308-x

Nano-Micro Letters   影响因子和分区

2311-6706

2150-5551

Fabricating low-strain and fast-charging silicon-carbon composite anodes is highly desired but remains a huge challenge for lithium-ion batteries. Herein, we report a unique silicon-carbon composite fabricated by uniformly dispersing amorphous Si nanodots (SiNDs) in carbon nanospheres (SiNDs/C) that are welded on the wall of the macroporous carbon framework (MPCF) by vertical graphene (VG), labeled as MPCF@VG@SiNDs/C. The high dispersity and amorphous features of ultrasmall SiNDs (~ 0.7 nm), the flexible and directed electron/Li transport channels of VG, and the MPCF impart the MPCF@VG@SiNDs/C more lithium storage sites, rapid Li transport path, and unique low-strain property during Li storage. Consequently, the MPCF@VG@SiNDs/C exhibits high cycle stability (1301.4 mAh g at 1 A g after 1000 cycles without apparent decay) and high rate capacity (910.3 mAh g, 20 A g) in half cells based on industrial electrode standards. The assembled pouch full cell delivers a high energy density (1694.0 Wh L; 602.8 Wh kg) and an excellent fast-charging capability (498.5 Wh kg, charging for 16.8 min at 3 C). This study opens new possibilities for preparing advanced silicon-carbon composite anodes for practical applications. [Figure not available: see fulltext.].

Amorphous Si nanodots Fast-charging Lithium-ion batteries Low-strain

SCI

英语

其他

2-s2.0-85183354800

Scopus

1.Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems,Shenzhen Engineering Lab for Supercapacitor Materials,School of Material Science and Engineering,Harbin Institute of Technology,Shenzhen,University Town,Shenzhen,518055,China
2.Songshan Lake Materials Laboratory Dongguan,Dongguan,Guangdong,523808,China
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Li，Zhenwei,Han，Meisheng,Yu，Peilun,et al. Macroporous Directed and Interconnected Carbon Architectures Endow Amorphous Silicon Nanodots as Low-Strain and Fast-Charging Anode for Lithium-Ion Batteries[J]. Nano-Micro Letters,2024,16(1).

Li，Zhenwei,Han，Meisheng,Yu，Peilun,Lin，Junsheng,&Yu，Jie.(2024).Macroporous Directed and Interconnected Carbon Architectures Endow Amorphous Silicon Nanodots as Low-Strain and Fast-Charging Anode for Lithium-Ion Batteries.Nano-Micro Letters,16(1).

Li，Zhenwei,et al."Macroporous Directed and Interconnected Carbon Architectures Endow Amorphous Silicon Nanodots as Low-Strain and Fast-Charging Anode for Lithium-Ion Batteries".Nano-Micro Letters 16.1(2024).