Insight into the capacity decay of layered sodium nickel manganese oxide cathodes in sodium ion batteries

Xinyin Cai; Yanan Xu; Lei Meng; Xiujuan Wei; Fangyu Xiong; Tengfei Xiong; Qinyou An

doi:10.1016/j.jallcom.2019.153093

Insight into the capacity decay of layered sodium nickel manganese oxide cathodes in sodium ion batteries

Xinyin Cai, Yanan Xu, Lei Meng^*, Xiujuan Wei, Fangyu Xiong, Tengfei Xiong, Qinyou An^*

^*Corresponding author for this work

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

16 Citations (Scopus)

Abstract

P2-type Na_xNi_1/3Mn_2/3O₂ is considered as one of the promising cathodes for sodium-ion batteries due to its low cost, low toxicity and high operating voltage. However, this material suffers the serious capacity decay and poor stability during cycling. Here, we performed the in-situ X-ray diffraction measurement to investigate the relationship among the voltage window, crystal structure evolution and capacity decay. Based on the finding that the capacity decay is mainly caused by the formation of oxygen anion group [O₂]^x−(0＜x＜4), we controlled the voltage in 2.6–3.8 V to avoid the oxygen reaction and the capacity retention of the material has been improved from ∼14% (for 100 cycles) to 94.5% (for 500 cycles).

Original language	English
Article number	153093
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	820
Online published	19 Nov 2019
DOIs	https://doi.org/10.1016/j.jallcom.2019.153093
Publication status	Published - 15 Apr 2020
Externally published	Yes

Research Keywords

Sodium-ion battery
Layered transition metal oxides
Cycling performance
Capacity decay
Structure evolution

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@article{ff958188902846d790ff82a1b3db7e4a,

title = "Insight into the capacity decay of layered sodium nickel manganese oxide cathodes in sodium ion batteries",

abstract = "P2-type NaxNi1/3Mn2/3O2 is considered as one of the promising cathodes for sodium-ion batteries due to its low cost, low toxicity and high operating voltage. However, this material suffers the serious capacity decay and poor stability during cycling. Here, we performed the in-situ X-ray diffraction measurement to investigate the relationship among the voltage window, crystal structure evolution and capacity decay. Based on the finding that the capacity decay is mainly caused by the formation of oxygen anion group [O2]x−(0＜x＜4), we controlled the voltage in 2.6–3.8 V to avoid the oxygen reaction and the capacity retention of the material has been improved from ∼14% (for 100 cycles) to 94.5% (for 500 cycles).",

keywords = "Sodium-ion battery, Layered transition metal oxides, Cycling performance, Capacity decay, Structure evolution",

author = "Xinyin Cai and Yanan Xu and Lei Meng and Xiujuan Wei and Fangyu Xiong and Tengfei Xiong and Qinyou An",

year = "2020",

month = apr,

day = "15",

doi = "10.1016/j.jallcom.2019.153093",

language = "English",

volume = "820",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Insight into the capacity decay of layered sodium nickel manganese oxide cathodes in sodium ion batteries

AU - Cai, Xinyin

AU - Xu, Yanan

AU - Meng, Lei

AU - Wei, Xiujuan

AU - Xiong, Fangyu

AU - Xiong, Tengfei

AU - An, Qinyou

PY - 2020/4/15

Y1 - 2020/4/15

N2 - P2-type NaxNi1/3Mn2/3O2 is considered as one of the promising cathodes for sodium-ion batteries due to its low cost, low toxicity and high operating voltage. However, this material suffers the serious capacity decay and poor stability during cycling. Here, we performed the in-situ X-ray diffraction measurement to investigate the relationship among the voltage window, crystal structure evolution and capacity decay. Based on the finding that the capacity decay is mainly caused by the formation of oxygen anion group [O2]x−(0＜x＜4), we controlled the voltage in 2.6–3.8 V to avoid the oxygen reaction and the capacity retention of the material has been improved from ∼14% (for 100 cycles) to 94.5% (for 500 cycles).

AB - P2-type NaxNi1/3Mn2/3O2 is considered as one of the promising cathodes for sodium-ion batteries due to its low cost, low toxicity and high operating voltage. However, this material suffers the serious capacity decay and poor stability during cycling. Here, we performed the in-situ X-ray diffraction measurement to investigate the relationship among the voltage window, crystal structure evolution and capacity decay. Based on the finding that the capacity decay is mainly caused by the formation of oxygen anion group [O2]x−(0＜x＜4), we controlled the voltage in 2.6–3.8 V to avoid the oxygen reaction and the capacity retention of the material has been improved from ∼14% (for 100 cycles) to 94.5% (for 500 cycles).

KW - Sodium-ion battery

KW - Layered transition metal oxides

KW - Cycling performance

KW - Capacity decay

KW - Structure evolution

U2 - 10.1016/j.jallcom.2019.153093

DO - 10.1016/j.jallcom.2019.153093

M3 - RGC 21 - Publication in refereed journal

SN - 0925-8388

VL - 820

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 153093

ER -

Insight into the capacity decay of layered sodium nickel manganese oxide cathodes in sodium ion batteries

Abstract

Research Keywords

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