INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Zheyu Zhang,Yuxiao Jia,Nuo Lei,Fei Chu,Liuhui Zhu,Mengdan Yu,Lixin Chen,Xuezhang Xiao
Developing a strategy for efficiently synthesizing borohydrides with high capacity and favorable reversibility is significant for promoting the development of next-generation energy materials. This work proposes a novel Mg(BH 4 ) 2 –TiNbNiCuO@graphene (Mg(BH 4 ) 2 –TiNbNiCuO@GR) high-entropy system, integrating nanoconfinement and catalytic strategies to significantly enhance the dehydrogenation kinetics and cycling stability of Mg(BH 4 ) 2 . TiNbNiCuO medium-entropy oxide (MEO) were synthesized in situ on a graphene carbon skeleton as catalyst (TiNbNiCuO@GR). Subsequently, Mg(BH 4 ) 2 was slowly infiltrated into the TiNbNiCuO@GR framework, which served as a carrier for nanoconfined Mg(BH 4 ) 2 , forming the Mg(BH 4 ) 2 –TiNbNiCuO@GR. It is demonstrated that the close contact between nanoconfined TiNbNiCuO MEO and Mg(BH 4 ) 2 creates abundant active sites, which facilitates electron transfer to improve dehydrogenation kinetics (dehydrogenation onset temperature at 63.5 °C) with a high capacity of 9.8 wt% H 2 . Notably, high-entropy effect and nanoconfinement boost the structure stability of TiNbNiCuO and prevent the agglomeration of Mg(BH 4 ) 2 , respectively, thereby jointly achieving an enhanced reversibility of the dehydrogenation kinetics, enabling a capacity retention of 81.5% after 10 cycles. The synergistic nanoconfinement-catalytic effect within the Mg(BH 4 ) 2 –TiNbNiCuO@GR offers new insights into the efficient dehydrogenation pathway of Mg-based borohydride systems.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xingyu Liu,Shaoyang Shen,Yunqi Jia,Lin Jiang,Liuzhang Ouyang
Hydrogen is a clean, sustainable, and efficient energy carrier. However, achieving safe and controllable storage for practical applications remains a challenge. The practical applications of lithium borohydride remain challenging due to its violent hydrolysis reaction. Herein, we report the synthesis of bimetallic hydrogen storage materials based on LiK(BH4)2 (LKBH-x-1) through ball-milling various ratios of potassium borohydride and lithium borohydride, which demonstrate excellent stability in aqueous solutions and extremely high hydrogen storage capacity. Optimizing reaction conditions indicated that the LKBH-4-1 produced from a 4:1 ratio exhibited an exceptionally high theoretical hydrogen storage capacity of 14.3 wt % while retaining excellent stability in aqueous solutions at ambient conditions. Further density functional theory (DFT) calculations revealed that the stability of LKBH-x-1 in aqueous solution is attributed to the robustness of B–H bonds in the differing phases. Furthermore, we clarify the feasibility of the LKBH-x-1 regeneration cycle by ball milling MgH2 and the hydrolysis products of LKBH-x-1. This work provides a new perspective for regulating borohydride hydrolysis for hydrogen production.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·Vol. 21
·期 40
·e01766
·
IF 12.1
Jinhu Wang,Ziqiang Wu,Kaiwen Wang,Zhuoqi Gong,Yihao Hu,Yao Zhang
Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) solid electrolyte, renowned for its high ionic conductivity and robust safety profile at room-temperature, holds tremendous promise for diverse applications. However, it faces significant challenges, including high interface impedance with lithium and a propensity for lithium dendrite formation. To address these issues, a novel Li 4 (BH 4 ) 3 I/2(d-BN) (LBHIbn) composite buffer layer — exhibiting high ionic conductivity and critical current density — is introduced at the LLZTO|Li interface. Theoretical calculations reveal that LBHIbn, serving as a protective layer of LLZTO, possesses a lower interface energy (0.366 J m −2 ) against lithium metal compared to LiBH 4 (0.434 J m −2 ). Consequently, at 30 °C, the interface impedance of the LLZTO | LBHIbn | Li system is significantly reduced to 4 Ω cm −2 . Simultaneously, the critical current density increases from 0.93 mA cm −2 of LLZTO | Li to 5.29 mA cm −2 (for LLZTO-LBHIbn | Li) with stable lithium-ion plating/stripping cycling demonstrated over 1000 h. Unlike conventional metal-based buffer layers that suffer from limited ionic conductivity, LBHIbn uniquely integrates high ionic conductivity (4.0 × 10−⁴ S cm −1 ) with superior electronic insulation (1.9 × 10−⁹ S cm −1 ), achieving simultaneous reduction of interfacial resistance (4Ω cm 2 at 30 °C) and effective suppression of lithium dendrite growth. This study demonstrates that the LBHIbn interface treatment effectively mitigates the interfacial issues between the LLZTO electrolyte and lithium anode, thereby expanding the potential applicability of hydride and oxide electrolyte materials in all-solid-state batteries
研究领域:
材料科学
·
电化学
·
储能技术
·
固态离子学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Hucheng Zhang,Yingying Shang,Jing Zhao,Jianji Wang
This work developed a facile colloidal route to synthesize BH4–-capped PdxAgy nanoparticles (NPs) in water using the reducing ionic liquids of [Cnmim]BH4, and the resulting NPs were prone to form the nanocomposites with [amim]+-modified reduced graphene (RG). The removal of the metal-free inorganic ions of BH4– can create the profoundly exposed interfaces on the PdxAgy NPs during the electrooxidation, and favor the ethanol oxidation reaction (EOR) in lowering energy barrier. The counterions of [Cnmim]+ can gather ethanol, OH– ions, and the reaction intermediates on catalysts, and synergistically interact with RG to facilitate the charge transfer in nanocomposites. The interface-modified RG nanosheets can effectively segregate the PdxAgy NPs from aggregation during the EOR. Along with the small size of 4.7 nm, the high alloying degree of 60.2%, the large electrochemical active surface area of 64.1 m2 g–1, and the great peak current density of 1501 mA cm–2 mg–1, Pd1Ag2@[C2mim]BH4-amimRG nanocomposite exhibits the low oxidation potentials, strong poison resistance, and stable catalytic activity for EOR in alkaline media, and hence can be employed as a promising anodic catalyst in ethanol fuel cells.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）