Stabilizing High-Voltage Lithium-Ion Battery Cathodes Using Functional Coatings of 2D Tungsten Diselenide

Sandipan Maiti; Rajashree Konar; Hadar Sclar; Judith Grinblat; Michael Talianker; Maria Tkachev; Xiaohan Wu; Aleksandr Kondrakov; Gilbert Daniel Nessim; Doron Aurbach

doi:10.1021/acsenergylett.2c00514

Stabilizing High-Voltage Lithium-Ion Battery Cathodes Using Functional Coatings of 2D Tungsten Diselenide

Sandipan Maiti, Rajashree Konar, Hadar Sclar, Judith Grinblat, Michael Talianker, Maria Tkachev, Xiaohan Wu, Aleksandr Kondrakov, Gilbert Daniel Nessim, Doron Aurbach

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

9 Scopus citations

Abstract

Functional surface coatings were applied on high voltage spinel (LiNi0.5Mn1.5O4; LNMO) and Ni-rich (LiNi0.85Co0.1Mn0.05O2; NCM851005) NCM cathode materials using few-layered 2H tungsten diselenide (WSe2). Simple liquid-phase mixing with WSe2 in 2-propanol and low-temperature (130 °C) heat treatment in nitrogen flow dramatically improved electrochemical performance, including stable cycling, high-rate performance, and lower voltage hysteresis in Li coin cells at 30 and 55 °C. Significantly improved capacity retention at 30 °C [Q401/Q9 of 99% vs 38% for LNMO and Q322/Q23 of 64% vs 46% for NCM851005] indicated efficient functionality. TEM and XPS clarified the coating distribution and coordination with the cathode surface, while postcycling studies revealed its sustainability, enabling lower transition metal dissolution and minor morphological deformation/microcrack formation. A modified and stable SEI was apparently formed owing to W and Se deposition on the Li anode during cycling. The synergistic functionalization provided a significant dual benefit of cathodic and anodic stability.

Original language	English
Pages (from-to)	1383-1391
Number of pages	9
Journal	ACS Energy Letters
Volume	7
Issue number	4
DOIs	https://doi.org/10.1021/acsenergylett.2c00514
State	Published - 8 Apr 2022

Bibliographical note

Funding Information:
This work was partially supported by the BASF SE, Germany, and the Israeli Committee for Higher Education within the INREP project framework.

Publisher Copyright:
© 2022 American Chemical Society.

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title = "Stabilizing High-Voltage Lithium-Ion Battery Cathodes Using Functional Coatings of 2D Tungsten Diselenide",

abstract = "Functional surface coatings were applied on high voltage spinel (LiNi0.5Mn1.5O4; LNMO) and Ni-rich (LiNi0.85Co0.1Mn0.05O2; NCM851005) NCM cathode materials using few-layered 2H tungsten diselenide (WSe2). Simple liquid-phase mixing with WSe2 in 2-propanol and low-temperature (130 °C) heat treatment in nitrogen flow dramatically improved electrochemical performance, including stable cycling, high-rate performance, and lower voltage hysteresis in Li coin cells at 30 and 55 °C. Significantly improved capacity retention at 30 °C [Q401/Q9 of 99% vs 38% for LNMO and Q322/Q23 of 64% vs 46% for NCM851005] indicated efficient functionality. TEM and XPS clarified the coating distribution and coordination with the cathode surface, while postcycling studies revealed its sustainability, enabling lower transition metal dissolution and minor morphological deformation/microcrack formation. A modified and stable SEI was apparently formed owing to W and Se deposition on the Li anode during cycling. The synergistic functionalization provided a significant dual benefit of cathodic and anodic stability.",

author = "Sandipan Maiti and Rajashree Konar and Hadar Sclar and Judith Grinblat and Michael Talianker and Maria Tkachev and Xiaohan Wu and Aleksandr Kondrakov and Nessim, {Gilbert Daniel} and Doron Aurbach",

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AU - Maiti, Sandipan

AU - Konar, Rajashree

AU - Sclar, Hadar

AU - Grinblat, Judith

AU - Talianker, Michael

AU - Tkachev, Maria

AU - Wu, Xiaohan

AU - Kondrakov, Aleksandr

AU - Nessim, Gilbert Daniel

AU - Aurbach, Doron

PY - 2022/4/8

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AB - Functional surface coatings were applied on high voltage spinel (LiNi0.5Mn1.5O4; LNMO) and Ni-rich (LiNi0.85Co0.1Mn0.05O2; NCM851005) NCM cathode materials using few-layered 2H tungsten diselenide (WSe2). Simple liquid-phase mixing with WSe2 in 2-propanol and low-temperature (130 °C) heat treatment in nitrogen flow dramatically improved electrochemical performance, including stable cycling, high-rate performance, and lower voltage hysteresis in Li coin cells at 30 and 55 °C. Significantly improved capacity retention at 30 °C [Q401/Q9 of 99% vs 38% for LNMO and Q322/Q23 of 64% vs 46% for NCM851005] indicated efficient functionality. TEM and XPS clarified the coating distribution and coordination with the cathode surface, while postcycling studies revealed its sustainability, enabling lower transition metal dissolution and minor morphological deformation/microcrack formation. A modified and stable SEI was apparently formed owing to W and Se deposition on the Li anode during cycling. The synergistic functionalization provided a significant dual benefit of cathodic and anodic stability.

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Stabilizing High-Voltage Lithium-Ion Battery Cathodes Using Functional Coatings of 2D Tungsten Diselenide

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