Acid-corrosion-formed amorphous phosphate surfaces improve electrochemical stability of LiNi0.80Co0.15Al0.05O2 cathodes

Shuangshuang Zhao; Li Shao; Xiang Li; Lishan Yang; Bin Wei; Yahui Yang; Haihong Zhao; Dulin Yin; Wenqing Ma; Zhongchang Wang

doi:10.1016/j.corsci.2020.108553

Acid-corrosion-formed amorphous phosphate surfaces improve electrochemical stability of LiNi_0.80Co_0.15Al_0.05O₂ cathodes

Shuangshuang Zhao
, Li Shao
, Xiang Li
, Lishan Yang^*
, Bin Wei
, Yahui Yang
, Haihong Zhao
, Dulin Yin
, Wenqing Ma
, Zhongchang Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

We report a surface modification of LiNi_0.8Co_0.15Al_0.05O₂ (NCA) materials with a phosphate layer via a room-temperature corrosion approach from H₃PO₄-ethanol solution. The phosphate layer is of amorphous nature with a thickness of 2∼3 nm, and consequently, NCA maintains its bulk structure during cycling and possesses significantly enhanced rate property of 153.7 mA h g⁻¹ at 5C. Simultaneously, such a modified system demonstrates an excellent cycling stability (107.5 mA h g⁻¹) and coulombic efficiency (>90 %) after 300 cycles at 5C. The findings highlight that the acid corrosion treatment represents a facile and efficient way in developing advanced NCA cathodes.

Original language	English
Article number	108553
Journal	Corrosion Science
Volume	168
DOIs	https://doi.org/10.1016/j.corsci.2020.108553
State	Published - 15 May 2020
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Acid corrosion
Amorphous phosphate
LiNiCoAlO
Lithium-ion battery
Surface degradation

Access to Document

10.1016/j.corsci.2020.108553

Cite this

@article{8b3db275a40745829d10137c13055b2c,

title = "Acid-corrosion-formed amorphous phosphate surfaces improve electrochemical stability of LiNi0.80Co0.15Al0.05O2 cathodes",

abstract = "We report a surface modification of LiNi0.8Co0.15Al0.05O2 (NCA) materials with a phosphate layer via a room-temperature corrosion approach from H3PO4-ethanol solution. The phosphate layer is of amorphous nature with a thickness of 2∼3 nm, and consequently, NCA maintains its bulk structure during cycling and possesses significantly enhanced rate property of 153.7 mA h g−1 at 5C. Simultaneously, such a modified system demonstrates an excellent cycling stability (107.5 mA h g−1) and coulombic efficiency (>90 \%) after 300 cycles at 5C. The findings highlight that the acid corrosion treatment represents a facile and efficient way in developing advanced NCA cathodes.",

keywords = "Acid corrosion, Amorphous phosphate, LiNiCoAlO, Lithium-ion battery, Surface degradation",

author = "Shuangshuang Zhao and Li Shao and Xiang Li and Lishan Yang and Bin Wei and Yahui Yang and Haihong Zhao and Dulin Yin and Wenqing Ma and Zhongchang Wang",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = may,

day = "15",

doi = "10.1016/j.corsci.2020.108553",

language = "英语",

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TY - JOUR

T1 - Acid-corrosion-formed amorphous phosphate surfaces improve electrochemical stability of LiNi0.80Co0.15Al0.05O2 cathodes

AU - Zhao, Shuangshuang

AU - Shao, Li

AU - Li, Xiang

AU - Yang, Lishan

AU - Wei, Bin

AU - Yang, Yahui

AU - Zhao, Haihong

AU - Yin, Dulin

AU - Ma, Wenqing

AU - Wang, Zhongchang

PY - 2020/5/15

Y1 - 2020/5/15

N2 - We report a surface modification of LiNi0.8Co0.15Al0.05O2 (NCA) materials with a phosphate layer via a room-temperature corrosion approach from H3PO4-ethanol solution. The phosphate layer is of amorphous nature with a thickness of 2∼3 nm, and consequently, NCA maintains its bulk structure during cycling and possesses significantly enhanced rate property of 153.7 mA h g−1 at 5C. Simultaneously, such a modified system demonstrates an excellent cycling stability (107.5 mA h g−1) and coulombic efficiency (>90 %) after 300 cycles at 5C. The findings highlight that the acid corrosion treatment represents a facile and efficient way in developing advanced NCA cathodes.

AB - We report a surface modification of LiNi0.8Co0.15Al0.05O2 (NCA) materials with a phosphate layer via a room-temperature corrosion approach from H3PO4-ethanol solution. The phosphate layer is of amorphous nature with a thickness of 2∼3 nm, and consequently, NCA maintains its bulk structure during cycling and possesses significantly enhanced rate property of 153.7 mA h g−1 at 5C. Simultaneously, such a modified system demonstrates an excellent cycling stability (107.5 mA h g−1) and coulombic efficiency (>90 %) after 300 cycles at 5C. The findings highlight that the acid corrosion treatment represents a facile and efficient way in developing advanced NCA cathodes.

KW - Acid corrosion

KW - Amorphous phosphate

KW - LiNiCoAlO

KW - Lithium-ion battery

KW - Surface degradation

UR - https://www.scopus.com/pages/publications/85080049777

U2 - 10.1016/j.corsci.2020.108553

DO - 10.1016/j.corsci.2020.108553

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SN - 0010-938X

VL - 168

JO - Corrosion Science

JF - Corrosion Science

M1 - 108553

ER -