A layered transition metal boride modified lithium-magnesium-boron-hydride composite hydrogen storage material
By introducing layered Mo4/3B2 MBene modifier, the problems of insufficient high temperature, slow kinetics and cycle stability of Li-Mg-BH composite hydrogen storage system were solved, and more efficient hydrogen storage performance and stability were achieved.
CN122102055APending Publication Date: 2026-05-29GUANGXI UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGXI UNIV
- Filing Date
- 2026-03-18
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing Li-Mg-BH composite hydrogen storage systems face problems such as high hydrogen release temperature, slow reaction kinetics, and insufficient cycle stability.
Method used
Layered Mo4/3B2MBene was introduced as a modifier to achieve nano-confinence through its unique layered structure and to reduce the activation energy of the hydrogen desorption reaction through its inherent catalytic activity.
Benefits of technology
It significantly improves the hydrogen storage performance of the LMBH system, with excellent cycle stability. After three hydrogen adsorption and desorption cycles, the capacity retention rate reaches 68.7%, which is better than the undoped and bulk MoB doped systems.
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Abstract
This invention relates to the field of hydrogen energy storage technology, specifically disclosing a layered transition metal boride-modified lithium-magnesium-boron-hydrogen composite hydrogen storage material and its preparation method. This material uses 2LiH+MgB2 as a matrix and adds layered Mo... 4 / 3 B2 MBene was prepared as a modifier; Mo was used as a modifier. 4 / 3 B2 MBene by (Mo 2 / 3 Y 1 / 3 The 2AlB2 MAB phase precursor was prepared by selectively etching with HF to remove Al and Y atoms, followed by intercalation, layering, and freeze-drying. This invention utilizes mechanical ball milling to process Mo... 4 / 3 B2 MBene introduces the Li-Mg-B-H (LMBH) composite system, utilizing Mo 4 / 3 The unique layered structure of B2 MBene, combined with its inherent catalytic activity, significantly reduces the hydrogen desorption temperature of the LMBH system and improves its hydrogen desorption kinetics and cycle stability. This material can release 8.1 wt% H2 within 60 minutes at 420℃, and maintains a capacity retention of 68.7% after three cycles. Its performance surpasses that of bulk MoB-doped and undoped LMBH systems, providing a new approach for performance regulation of lightweight hydrogen storage materials and demonstrating promising practical application prospects.
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