Finite phosphorene derived partial reduction of metal organic framework nanofoams for enhanced lithium storage capability

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

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Author(s)

  • Shuang Gu
  • Danni Liu
  • Xue Zhang
  • Hao Huang
  • Yanli Zhang
  • Ziqiang Cheng
  • Qian Liu
  • Lingqiang Meng
  • Jiahong Wang
  • Xue-Feng Yu

Detail(s)

Original languageEnglish
Article number231025
Journal / PublicationJournal of Power Sources
Volume525
Online published11 Feb 2022
Publication statusPublished - 30 Mar 2022

Abstract

As a new class of crystalline porous materials, metal organic frameworks (MOFs) are promising in lithium-ion batteries (LIBs). However, the electrical conductivity and stability of conventional MOFs cannot meet the demand by next-generation high-rate LIBs. Herein, a partially-reduced MOF nanofoam (NiCo-MOF(P) NF) is synthesized by adding a small amount of phosphorene during the sol-gel self-assembly process. Since the amount of surface metallic species is increased, the carrier concentration and electrical conductivity are improved. Moreover, the structural stability is enhanced by phosphorus-oxygen and phosphorus-metal bonds generated during partial reduction. Although the phosphorus concentration is quite low (<2 wt%), the NiCo-MOF(P) NFs exhibit three times higher reversible lithium storage capacity (1230.3 mA h g−1 at 0.2 A g−1) compared to the stock NiCo-MOF after 250 cycles. At a higher current density (2.0 A g−1), the NiCo-MOF(P) NFs maintain the high capability (550 mA h g−1) after 700 cycles. These results demonstrate that the novel process of phosphorene-induced mild reduction improves the lithium storage capability of mixed-valence MOFs. The surface functionalization strategy and unique in situ molecular interactions have large potential in the development of advanced functional materials.

Research Area(s)

  • High rates, Lithium storage, Metal organic frameworks, Partial reduction, Phosphorene

Citation Format(s)

Finite phosphorene derived partial reduction of metal organic framework nanofoams for enhanced lithium storage capability. / Gu, Shuang; Liu, Danni; Zhang, Xue; Huang, Hao; Zhang, Yanli; Cheng, Ziqiang; Liu, Qian; Meng, Lingqiang; Wang, Jiahong; Chu, Paul K.; Yu, Xue-Feng.

In: Journal of Power Sources, Vol. 525, 231025, 30.03.2022.

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