Encapsulation of selenium in MOF-derived N,O-codoped porous flower-like carbon host for Na-Se batteries

Xiao，Fengping1; Yang，Xuming3; Yao，Tianhao2; Wang，Hongkang2; Rogach，Andrey L.1

2022-02-15

10.1016/j.cej.2021.132737

CHEMICAL ENGINEERING JOURNAL   影响因子和分区

1385-8947

Na-Se batteries have their drawbacks such as large volumetric expansion and shuttle effect related to generation of soluble sodium polyselenides. To address these issues, a nitrogen and oxygen codoped flower-like porous carbon host is derived from a Ni-based metal–organic framework (MOF) for Se storage. The use of 4,4′-oxybisbenzoic acid and 4,4′-dimethyl-2,2′-bipyridyl ligands ensure the in-situ doping of the carbon host with oxygen and nitrogen upon carbonization of MOF, which increases its polarity and restricts the diffusion of selenium. Highly porous microflower-like carbon morphology provides sufficient space for Se storage. To avoid undesirable aggregation of Se particles which happens when using conventional melt-diffusion method, we employed a vapor-infiltration method for Se loading, which ensures the homogeneous dispersion of selenium and high utilization of pores in the carbon host. Density functional theory calculations confirmed that the increased polarity of the carbon host due to N,O codoping promotes the adsorption of polyselenides. When tested as a cathode for sodium-selenium battery, the optimized carbon/selenium composite shows an excellent electrochemical performance.

Carbon host Heteroatom doping Metal–organic frameworks Sodium-selenium batteries Vapor-infiltration method

EI

英语

其他

20214511109750

Carbonization ; Density functional theory ; Nitrogen ; Oxygen ; Porous materials ; Secondary batteries ; Selenium ; Sodium ; Sodium compounds ; Sulfur

Alkali Metals:549.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Secondary Batteries:702.1.2 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; Materials Science:951

ENGINEERING

2-s2.0-85118339302

Scopus

1.Department of Materials Science and Engineering,and Center for Functional Photonics (CFP),City University of Hong Kong,Kowloon,83 Tat Chee Avenue,999077,Hong Kong
2.State Key Lab of Electrical Insulation and Power Equipment,Center of Nanomaterials for Renewable Energy (CNRE),School of Electrical Engineering,Xi'an JiaoTong University,Xi'an,710049,China
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Xiao，Fengping,Yang，Xuming,Yao，Tianhao,et al. Encapsulation of selenium in MOF-derived N,O-codoped porous flower-like carbon host for Na-Se batteries[J]. CHEMICAL ENGINEERING JOURNAL,2022,430.

Xiao，Fengping,Yang，Xuming,Yao，Tianhao,Wang，Hongkang,&Rogach，Andrey L..(2022).Encapsulation of selenium in MOF-derived N,O-codoped porous flower-like carbon host for Na-Se batteries.CHEMICAL ENGINEERING JOURNAL,430.

Xiao，Fengping,et al."Encapsulation of selenium in MOF-derived N,O-codoped porous flower-like carbon host for Na-Se batteries".CHEMICAL ENGINEERING JOURNAL 430(2022).