DataVXACS Applied Energy MaterialsPaper
journal article·2024-03-25

Revisiting the Temperature-Dependent Phase Structure of Spinel LiNi0.5Mn1.5O4 for Lithium-Ion Batteries

Jinfeng Zeng, Kang Wu, Na Li, Lunhua He, Baotian Wang, Xiaoming Lin, Enyue Zhao

ACS Applied Energy Materials· Volume 7· Issue 6
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Source abstract

Abstract

To optimize the high-voltage spinel cathode LiNi 0.5 Mn 1.5 O 4 (LNMO), understanding the influence of different phase composites (i.e., the Fd 3̅ m and P 4 3 32 phases) on its electrochemical performance is essential. This study investigates the phase ratio of the Fd 3̅ m phase and P 4 3 32 phase spinel structures in LNMO as influenced by the calcining temperature using neutron powder diffraction and X-ray powder diffraction (XRD). The coexistence of the Fd 3̅ m and P 4 3 32 phases in the LNMO products is found to be temperature-dependent. In situ XRD and Raman analyses reveal that LNMO products with a higher proportion of the Fd 3̅ m phase exhibit improved ion-transport efficiency but also suffer from increased Mn 3+ solubility and subsequent irreversible capacities, limiting battery cycling stability. In situ variable-temperature XRD identifies an optimal synthetic temperature range for LNMO, facilitating the synthesis of materials with the desired phase proportions and crystal structures.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageComposites

OpenAlex topics: Advancements in Battery Materials · Ferroelectric and Piezoelectric Materials · Electrical and Thermal Properties of Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China

College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Spallation Neutron Source Science Center, Dongguan, Guangdong 523803, China

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou, Guangdong 510006, China

Funding

Basic and Applied Basic Research Foundation of Guangdong Province · National Natural Science Foundation of China

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