Potassium Dual-Ion Hybrid Batteries with Ultrahigh Rate Performance and Excellent Cycling Stability

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

5 Scopus Citations
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Author(s)

  • Xuan Ding
  • Fan Zhang
  • Bifa Ji
  • Yi Liu
  • Jinrui Li
  • Yongbing Tang

Detail(s)

Original languageEnglish
Pages (from-to)42294-42300
Journal / PublicationACS Applied Materials and Interfaces
Volume10
Issue number49
Online published19 Nov 2018
Publication statusPublished - 12 Dec 2018

Abstract

Potassium-ion batteries (KIBs) are regarded as a potential alternative battery technology to conventional lithium-ion batteries owing to their low potential, natural abundance, and the low cost of potassium. However, sluggish reaction kinetic of the much larger K+ ions leads to low rate capability and poor cycling performance of KIBs, restricting KIB's practical applications. Herein, we propose a novel full battery called a potassium dual-ion hybrid battery (KDHB) by employing an absorption-type hierarchical porous carbon as the anode material and an anion intercalation-type expanded graphite (EG) as the cathode material. Owing to the hybrid mechanism of the battery and capacitive reaction, the KDHB exhibits superior rate performance with a high capacity of 82 mA h g-1 even at a high current density of 3 A g-1 with negligible capacity decay. Moreover, the KDHB exhibits excellent cycling performance with 74.2% capacity retention after 2000 cycles at 1 A g-1, which is so far the best performance of the reported KDIBs.

Research Area(s)

  • capacitive anode, dual-ion hybrid battery, graphite cathode, hierarchical porous carbon, potassium-ion electrolyte

Citation Format(s)

Potassium Dual-Ion Hybrid Batteries with Ultrahigh Rate Performance and Excellent Cycling Stability. / Ding, Xuan; Zhang, Fan; Ji, Bifa; Liu, Yi; Li, Jinrui; Lee, Chun-Sing; Tang, Yongbing.

In: ACS Applied Materials and Interfaces, Vol. 10, No. 49, 12.12.2018, p. 42294-42300.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review