Silicon monophosphides with controlled size and crystallinity for enhanced lithium anodic performance

Yang, Huanhuan1,2; Yu, Binlu1,3; Gu, Shuang1; Huang, Hao1,2; Zhang, Yanli1; Liu, Danni1; Zhang, Xue1; Kang, Yihong1,2; Wang, Jiahong1,2,4,5; Chu, Paul K.4,5; Yu, Xue-Feng1,2

2021-01-07

10.1039/d0nr07386e

Nanoscale   影响因子和分区

2040-3364

2040-3372

New electrode materials are crucial to high-performance lithium-ion batteries (LIBs). Silicon monophosphides (SiPs), composed of silicon and phosphorus, have a very high theoretical capacity (3060 mA h g(-1)), which is more than 8 times that of graphite (372 mA h g(-1)). The two-dimensional structure of SiPs also benefits ion transportation and diffusion. In this work, the chemical vapor transport (CVT) method is employed to synthesize SiPs for LIB anodes, and the lithium storage capacity co-affected by size and crystallinity is investigated using controllably synthesized thin belts and bulk crystals. The SiPs prepared by the high-temperature iodine-assisted CVT method have a belt-like morphology about 72 nm thick. After 200 cycles, the stable capacity is about 615 mA h g(-1) at 100 mA g(-1), and a reversible capacity of similar to 320 mA h g(-1) is achieved at a high current density of 5.0 A g(-1). In contrast, the micrometer-thick bulk SiP crystals cannot provide efficient lithium ion extraction. Moreover, the smaller and thinner SiPs obtained at a lower temperature show abnormally high mass transport resistance and low lithium ion diffusivity. These results demonstrate that SiPs are promising LIB anode materials, and the size and crystallinity are closely related to the anodic performance. This new knowledge is valuable for the development of high-performance LIBs.

SCI ; EI

英语

其他

National Natural Science Foundation of China[51702352,21975280,51821229] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH034] ; Youth Innovation Promotion Association Chinese Academy of Sciences[2020354] ; Guangdong Special Support Program[2017TX04C096] ; Leading Talents of Guangdong Province Program[00201520] ; Shenzhen Science and Technology Research Funding["JCYJ20180507182530279","JCYJ20180507182047316"] ; City University of Hong Kong Strategic Research Grant (SRG)[7005105]

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

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000607350900003

ROYAL SOC CHEMISTRY

20210309770558

Anodes ; Crystallinity ; Crystals ; Ions ; Lithium-ion batteries ; Phosphorus compounds ; Transport properties

Electron Tubes:714.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Crystalline Solids:933.1

Web of Science

1.Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen Engn Ctr Fabricat Two Dimens Atom Crysta, Shenzhen 518055, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Southern Univ Sci & Technol, Sch Microelect, Shenzhen 518055, Peoples R China
4.City Univ Hong Kong, Dept Phys, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
5.City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China

Yang, Huanhuan,Yu, Binlu,Gu, Shuang,et al. Silicon monophosphides with controlled size and crystallinity for enhanced lithium anodic performance[J]. Nanoscale,2021,13(1):51-58.

Yang, Huanhuan.,Yu, Binlu.,Gu, Shuang.,Huang, Hao.,Zhang, Yanli.,...&Yu, Xue-Feng.(2021).Silicon monophosphides with controlled size and crystallinity for enhanced lithium anodic performance.Nanoscale,13(1),51-58.

Yang, Huanhuan,et al."Silicon monophosphides with controlled size and crystallinity for enhanced lithium anodic performance".Nanoscale 13.1(2021):51-58.