Operando Analysis of Gas Evolution in TiNb2O7(TNO)-Based Anodes for Advanced High-Energy Lithium-Ion Batteries under Fast Charging

Dhrupad Parikh; Linxiao Geng; Hailong Lyu; Charl J. Jafta; Hansan Liu; Harry M. Meyer; Jihua Chen; Xiao Guang Sun; Sheng Dai; Jianlin Li

doi:10.1021/acsami.1c16866

Operando Analysis of Gas Evolution in TiNb₂O₇(TNO)-Based Anodes for Advanced High-Energy Lithium-Ion Batteries under Fast Charging

Dhrupad Parikh, Linxiao Geng, Hailong Lyu, Charl J. Jafta, Hansan Liu, Harry M. Meyer, Jihua Chen, Xiao Guang Sun, Sheng Dai, Jianlin Li

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

18 Scopus citations

Abstract

TiNb2O7 (TNO) is regarded as one of the promising next-generation anode materials for lithium-ion batteries (LIBs) due to its high rate capabilities, higher theoretical capacity, and higher lithiation voltage. This enables the cycling of TNO-based anodes under extreme fast charging (XFC) conditions with a minimal risk of lithium plating compared to that of graphite anodes. Here, the gas evolution in real time with TNO-based pouch cells is first reported via operando mass spectrometry. The main gases are identified to be CO2, C2H4, and O2. A solid-electrolyte interphase is detected on TNO, which continues evolving, forming, and dissolving with the lithiation and delithiation of TNO. The gas evolution can be significantly reduced when a protective coating is applied on the TNO particles, reducing the CO2 and C2H4 evolution by ∼2 and 5 times, respectively, at 0.1C in a half-cell configuration. The reduction on gas generation in full cells is even more pronounced. The surface coating also enables 20% improvement in capacity under XFC conditions.

Original language	English
Pages (from-to)	55145-55155
Number of pages	11
Journal	ACS Applied Materials and Interfaces
Volume	13
Issue number	46
DOIs	https://doi.org/10.1021/acsami.1c16866
State	Published - Nov 24 2021

Funding

This research, conducted at the Oak Ridge National Laboratory, managed by UT Battelle, LLC, for the U.S. Department of Energy (DOE) under contract DE-AC05-00OR22725, was sponsored by the Office of Energy Efficiency and Renewable Energy (EERE) Vehicle Technologies Office (VTO) (Program Manager: Brian Cunningham). TEM work was conducted at the Center for Nanophase Materials Sciences (CNMS), which is a DOE Office of Science User Facility. This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. The DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy
UT-Battelle

Keywords

Fast charging
Gas evolution
TNO-TiNbO
operando mass spectrometry
solid-electrolyte interphase

UN SDGs

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

Access to Document

10.1021/acsami.1c16866

Cite this

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title = "Operando Analysis of Gas Evolution in TiNb2O7(TNO)-Based Anodes for Advanced High-Energy Lithium-Ion Batteries under Fast Charging",

abstract = "TiNb2O7 (TNO) is regarded as one of the promising next-generation anode materials for lithium-ion batteries (LIBs) due to its high rate capabilities, higher theoretical capacity, and higher lithiation voltage. This enables the cycling of TNO-based anodes under extreme fast charging (XFC) conditions with a minimal risk of lithium plating compared to that of graphite anodes. Here, the gas evolution in real time with TNO-based pouch cells is first reported via operando mass spectrometry. The main gases are identified to be CO2, C2H4, and O2. A solid-electrolyte interphase is detected on TNO, which continues evolving, forming, and dissolving with the lithiation and delithiation of TNO. The gas evolution can be significantly reduced when a protective coating is applied on the TNO particles, reducing the CO2 and C2H4 evolution by ∼2 and 5 times, respectively, at 0.1C in a half-cell configuration. The reduction on gas generation in full cells is even more pronounced. The surface coating also enables 20% improvement in capacity under XFC conditions.",

keywords = "Fast charging, Gas evolution, TNO-TiNbO, operando mass spectrometry, solid-electrolyte interphase",

author = "Dhrupad Parikh and Linxiao Geng and Hailong Lyu and Jafta, {Charl J.} and Hansan Liu and Meyer, {Harry M.} and Jihua Chen and Sun, {Xiao Guang} and Sheng Dai and Jianlin Li",

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AU - Lyu, Hailong

AU - Jafta, Charl J.

AU - Liu, Hansan

AU - Meyer, Harry M.

AU - Chen, Jihua

AU - Sun, Xiao Guang

AU - Dai, Sheng

AU - Li, Jianlin

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N2 - TiNb2O7 (TNO) is regarded as one of the promising next-generation anode materials for lithium-ion batteries (LIBs) due to its high rate capabilities, higher theoretical capacity, and higher lithiation voltage. This enables the cycling of TNO-based anodes under extreme fast charging (XFC) conditions with a minimal risk of lithium plating compared to that of graphite anodes. Here, the gas evolution in real time with TNO-based pouch cells is first reported via operando mass spectrometry. The main gases are identified to be CO2, C2H4, and O2. A solid-electrolyte interphase is detected on TNO, which continues evolving, forming, and dissolving with the lithiation and delithiation of TNO. The gas evolution can be significantly reduced when a protective coating is applied on the TNO particles, reducing the CO2 and C2H4 evolution by ∼2 and 5 times, respectively, at 0.1C in a half-cell configuration. The reduction on gas generation in full cells is even more pronounced. The surface coating also enables 20% improvement in capacity under XFC conditions.

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