Enhancement of the electrochemical performance of LiFePO4 cathode material by nanosecond laser annealing

S. S. Sahoo; J. Narayan; R. J. Narayan; Xiao Guang Sun; Mariappan Parans Paranthaman

doi:10.1557/s43579-025-00701-4

Enhancement of the electrochemical performance of LiFePO₄ cathode material by nanosecond laser annealing

S. S. Sahoo
, J. Narayan
, R. J. Narayan
, Xiao Guang Sun
, Mariappan Parans Paranthaman

Nanomaterials Chemistry Group

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

2 Scopus citations

Abstract

Pulsed laser annealing of LiFePO₄ can improve conductivity by increasing oxygen vacancy-related defect concentration; this approach can improve the current carrying capacity of LIB cathodes from 135 to 145 mAh g⁻¹ under optimized conditions. Since the depth of the laser annealing region is less than 1 µm, the increase is equivalent to a 125% overall improvement in the charge capacity if the entire thickness of the LiFePO₄ region is treated by pulsed laser annealing. Pulsed laser annealing has two primary effects on the atomic structure of LiFePO₄, namely an increase in anionic vacancy concentration and antisite defect concentration.

Original language	English
Pages (from-to)	255-264
Number of pages	10
Journal	MRS Communications
Volume	15
Issue number	2
DOIs	https://doi.org/10.1557/s43579-025-00701-4
State	Published - Apr 2025

Funding

This work was supported by the National Science Foundation Grant (DMR-2016256). Battery testing research (XS and MPP) was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under contract number DE-AC05-00OR22725. This work was performed in part at the Analytical Instrumentation Facility (AIF) at North Carolina State University, which is supported by the State of North Carolina and the National Science Foundation (award number ECCS-2025064). The AIF is a member of the North Carolina Research Triangle Nanotechnology Network (RTNN), a site in the National Nanotechnology Coordinated Infrastructure (NNCI). This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and 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. 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).

Keywords

Defects
Energy storage
Laser annealing
Li

Access to Document

10.1557/s43579-025-00701-4

Cite this

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abstract = "Pulsed laser annealing of LiFePO4 can improve conductivity by increasing oxygen vacancy-related defect concentration; this approach can improve the current carrying capacity of LIB cathodes from 135 to 145 mAh g−1 under optimized conditions. Since the depth of the laser annealing region is less than 1 µm, the increase is equivalent to a 125\% overall improvement in the charge capacity if the entire thickness of the LiFePO4 region is treated by pulsed laser annealing. Pulsed laser annealing has two primary effects on the atomic structure of LiFePO4, namely an increase in anionic vacancy concentration and antisite defect concentration.",

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