Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity

Bizhe Su; Hanqin Liang; Junnan Liu; Jimmy Wu; Neeraj Sharma; Qinfen Gu; Bernt Johannessen; Denis Y. W. Yu

doi:10.1039/d0cc02816a

Novel structurally-stable Na-rich Na₄V₂O₇ cathode material with high reversible capacity by utilization of anion redox activity

Bizhe Su
, Hanqin Liang
, Junnan Liu
, Jimmy Wu
, Neeraj Sharma
, Qinfen Gu
, Bernt Johannessen
, Denis Y. W. Yu^*

^*Corresponding author for this work

School of Energy and Environment

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

10 Citations (Scopus)

Abstract

A sodium-rich vanadium compound, Na₄V₂O₇, is investigated as a cathode material for sodium-ion batteries, which delivers a high reversible capacity of 194 mA h g^-1after activating to 4.7 V. By limiting the cut-off voltage to 4.4 V, a good capacity retention of 93% after 50 cycles is achieved. The material exhibits a negligible volume variation of 1.04% during Na⁺(de-)intercalation, demonstrating that Na₄V₂O₇is structurally-stable.

Original language	English
Pages (from-to)	8245-8248
Journal	Chemical communications (Cambridge, England)
Volume	56
Issue number	59
Online published	15 Jun 2020
DOIs	https://doi.org/10.1039/d0cc02816a
Publication status	Published - 28 Jul 2020

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Access Output

10.1039/d0cc02816a

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{0216a08c1a7a4152b897f5ee234695f2,

title = "Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity",

abstract = "A sodium-rich vanadium compound, Na4V2O7, is investigated as a cathode material for sodium-ion batteries, which delivers a high reversible capacity of 194 mA h g-1 after activating to 4.7 V. By limiting the cut-off voltage to 4.4 V, a good capacity retention of 93\% after 50 cycles is achieved. The material exhibits a negligible volume variation of 1.04\% during Na+(de-)intercalation, demonstrating that Na4V2O7 is structurally-stable.",

author = "Bizhe Su and Hanqin Liang and Junnan Liu and Jimmy Wu and Neeraj Sharma and Qinfen Gu and Bernt Johannessen and Yu, \{Denis Y. W.\}",

year = "2020",

month = jul,

day = "28",

doi = "10.1039/d0cc02816a",

language = "English",

volume = "56",

pages = "8245--8248 ",

journal = "Chemical communications (Cambridge, England)",

issn = "1364-548X",

publisher = "Royal Society of Chemistry",

number = "59",

}

Novel structurally-stable Na-rich Na₄V₂O₇ cathode material with high reversible capacity by utilization of anion redox activity. / Su, Bizhe; Liang, Hanqin; Liu, Junnan et al.
In: Chemical communications (Cambridge, England), Vol. 56, No. 59, 28.07.2020, p. 8245-8248 .

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity

AU - Su, Bizhe

AU - Liang, Hanqin

AU - Liu, Junnan

AU - Wu, Jimmy

AU - Sharma, Neeraj

AU - Gu, Qinfen

AU - Johannessen, Bernt

AU - Yu, Denis Y. W.

PY - 2020/7/28

Y1 - 2020/7/28

N2 - A sodium-rich vanadium compound, Na4V2O7, is investigated as a cathode material for sodium-ion batteries, which delivers a high reversible capacity of 194 mA h g-1 after activating to 4.7 V. By limiting the cut-off voltage to 4.4 V, a good capacity retention of 93% after 50 cycles is achieved. The material exhibits a negligible volume variation of 1.04% during Na+(de-)intercalation, demonstrating that Na4V2O7 is structurally-stable.

AB - A sodium-rich vanadium compound, Na4V2O7, is investigated as a cathode material for sodium-ion batteries, which delivers a high reversible capacity of 194 mA h g-1 after activating to 4.7 V. By limiting the cut-off voltage to 4.4 V, a good capacity retention of 93% after 50 cycles is achieved. The material exhibits a negligible volume variation of 1.04% during Na+(de-)intercalation, demonstrating that Na4V2O7 is structurally-stable.

UR - https://www.scopus.com/pages/publications/85088609661

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85088609661&origin=recordpage

U2 - 10.1039/d0cc02816a

DO - 10.1039/d0cc02816a

M3 - RGC 21 - Publication in refereed journal

C2 - 32558831

SN - 1364-548X

VL - 56

SP - 8245

EP - 8248

JO - Chemical communications (Cambridge, England)

JF - Chemical communications (Cambridge, England)

IS - 59

ER -

Novel structurally-stable Na-rich Na₄V₂O₇ cathode material with high reversible capacity by utilization of anion redox activity

Abstract

UN SDGs

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

GRF: Changing the Face of Battery Chemistries: Using Dual Redox Sites to Enable High Capacity in Sodium-ion Cathode Materials

Cite this

Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity

Abstract

UN SDGs

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

GRF: Changing the Face of Battery Chemistries: Using Dual Redox Sites to Enable High Capacity in Sodium-ion Cathode Materials

Cite this

Novel structurally-stable Na-rich Na₄V₂O₇ cathode material with high reversible capacity by utilization of anion redox activity