Tailoring Ultrafast and High-Capacity Sodium Storage via Binding-Energy-Driven Atomic Scissors

Baixin Peng; Zhuoran Lv; Shumao Xu; Jun Pan; Wei Zhao; Chenlong Dong; Fuqiang Huang

doi:10.1002/adma.202200863

Tailoring Ultrafast and High-Capacity Sodium Storage via Binding-Energy-Driven Atomic Scissors

Adv Mater. 2022 Jul;34(27):e2200863. doi: 10.1002/adma.202200863. Epub 2022 Jun 3.

Authors

Baixin Peng^{1

2}, Zhuoran Lv^{1

2}, Shumao Xu¹, Jun Pan¹, Wei Zhao¹, Chenlong Dong³, Fuqiang Huang^{1

4}

Affiliations

¹ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.
² Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
³ Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, P. R. China.
⁴ Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.

PMID: 35508587
DOI: 10.1002/adma.202200863

Abstract

Controllably tailoring alloying anode materials to achieve fast charging and enhanced structural stability is crucial for sodium-ion batteries with high rate and high capacity performance, yet remains a significant challenge owing to the huge volume change and sluggish sodiation kinetics. Here, a chemical tailoring tool is proposed and developed by atomically dispersing high-capacity Ge metal into the rigid and conductive sulfide framework for controllable reconstruction of GeS bonds to synergistically realize high capacity and high rate performance for sodium storage. The integrated GeTiS₃ material with stable Ti-S framework and weak GeS bonding delivers high specific capacities of 678 mA h g^-1 at 0.3 C over 100 cycles and 209 mA h g^-1 at 32 C over 10 000 cycles, outperforming most of the reported alloying type anode materials for sodium storage. Interestingly, in situ Raman, X-ray diffraction (XRD), and ex situ transmission electron microscopy (TEM) characterizations reveal the formation of well-dispersed Na_x Ge confined in the rigid Ti-S matrix with suppressed volume change after discharge. The synergistically coupled alloying-conversion and surface-dominated redox reactions with enhanced capacitive contribution and high reaction reversibility by a binding-energy-driven atomic scissors method would break new ground on designing a high-rate and high-capacity sodium-ion batteries.

Keywords: GeTiS 3; atomic scissors; capacitive contribution; sodium-ion batteries.

Abstract

Grants and funding