An All-Integrated Anode via Interlinked Chemical Bonding between Double-Shelled-Yolk-Structured Silicon and Binder for Lithium-Ion Batteries

Yajie Liu; Zhixin Tai; Tengfei Zhou; Vitor Sencadas; Jian Zhang; Lei Zhang; Konstantin Konstantinov; Zaiping Guo; Hua Kun Liu

doi:10.1002/adma.201703028

An All-Integrated Anode via Interlinked Chemical Bonding between Double-Shelled-Yolk-Structured Silicon and Binder for Lithium-Ion Batteries

Adv Mater. 2017 Nov;29(44). doi: 10.1002/adma.201703028. Epub 2017 Oct 12.

Authors

Yajie Liu¹, Zhixin Tai¹, Tengfei Zhou¹, Vitor Sencadas^{2

3}, Jian Zhang⁴, Lei Zhang¹, Konstantin Konstantinov¹, Zaiping Guo^{1

2}, Hua Kun Liu¹

Affiliations

¹ Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials, University of Wollongong, Innovation Campus, North Wollongong, NSW, 2500, Australia.
² School of Mechanical Materials and Mechatronics Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia.
³ ARC Center of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia.
⁴ College of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha, 410114, China.

PMID: 29024100
DOI: 10.1002/adma.201703028

Abstract

The concept of an all-integrated design with multifunctionalization is widely employed in optoelectronic devices, sensors, resonator systems, and microfluidic devices, resulting in benefits for many ongoing research projects. Here, maintaining structural/electrode stability against large volume change by means of an all-integrated design is realized for silicon anodes. An all-integrated silicon anode is achieved via multicomponent interlinking among carbon@void@silica@silicon (CVSS) nanospheres and cross-linked carboxymethyl cellulose and citric acid polymer binder (c-CMC-CA). Due to the additional protection from the silica layer, CVSS is superior to the carbon@void@silicon (CVS) electrode in terms of long-term cyclability. The as-prepared all-integrated CVSS electrode exhibits high mechanical strength, which can be ascribed to the high adhesivity and ductility of c-CMC-CA binder and the strong binding energy between CVSS and c-CMC-CA, as calculated based on density functional theory (DFT). This electrode exhibits a high reversible capacity of 1640 mA h g^-1 after 100 cycles at a current density of 1 A g^-1 , high rate performance, and long-term cycling stability with 84.6% capacity retention after 1000 cycles at 5 A g^-1 .

Keywords: all-integrated electrodes; binding energy; double-shelled-yolk-structured; lithium-ion batteries; multicomponent interlinking.