A review on the current progress of metal hydrides material for solid-state hydrogen storage applications

Hydrogen storage systems (HSSs), are the backbone of feasible hydrogen economy. To provide a reliable renewable energy system, safe, cost effective and compact HSS is due. Physical storage systems involve the compressed gas, liquid and cryo-compressed techniques while material based one involves adsorptive materials, metal hydrides and chemical storage materials. In this paper, the features of a variety of HSSs are impartially discussed. The technical comparative analysis of the different physical and material based types of HSSs illustrates the paradoxical inherent features, including gravimetric and volumetric storage densities and parameters associated with storage and release processes, among these systems. Accordingly, no ideal hydrogen storage technique can be considered the best-fit for all stationary and automotive applications. Therefore, not only a unique HSS solution can properly provide the needs, but a set of complementary HSS solutions which may offer the system designer several options. This set of options can be hardly interpretable in case of the unclear definition of the application needs which may be time variant. Inside this review, the critical insights and recommendations about suitable applications for storage systems are provided. Different standards and codes alongside the corresponding tests are demonstrated for the different storage technologies. Moreover, storage vessels research work is overviewed for the different hydrogen storage technologies. In addition, the failure behaviour, criteria and prediction models are investigated for composite vessels subjected to high pressures and extreme temperatures degrading their mechanical behaviour and failure resistance.

Hydrogen storage technologies for stationary and mobile applications: Review, analysis and perspectives

Progress of hydrogen storage alloys for Ni-MH rechargeable power batteries in electric vehicles: A review

In this review article, the fundamentals of electrochemical reactions involving metal hydrides are explained, followed by a report of recent progress in hydrogen storage alloys for electrochemical applications. The status of various alloy systems, including AB₅, AB₂, A₂B₇-type, Ti-Ni-based, Mg-Ni-based, BCC, and Zr-Ni-based metal hydride alloys, for their most important electrochemical application, the nickel metal hydride battery, is summarized. Other electrochemical applications, such as Ni-hydrogen, fuel cell, Li-ion battery, air-metal hydride, and hybrid battery systems, also have been mentioned.

/pdf/the-current-status-of-hydrogen-storage-alloy-development-for-250ciqt8ke.pdf

The Current Status of Hydrogen Storage Alloy Development for Electrochemical Applications

Hydrogen storage for off-grid power supply

Structure and electrochemical characteristics of melted composite Ti0.10Zr0.15V0.35Cr0.10Ni0.30-LaNi5 hydrogen storage alloys

Microstructures and electrochemical properties of Ti0.26Zr0.07V0.21Mn0.1Ni0.33Mox (x=0,0.025,0.05,0.075, 0.10) electrode alloys have been investigated. The results of XRD analysis show that the alloys are mainly composed of V-based solid solution phase with body centered cubic (bcc) structure and C14 Laves phase with hexagonal structure. The addition of Mo element can imp ove the activation characteristics, maximum discharge capacity and cyclic durability for the electrode alloys

Structures and electrochemical characteristics of Ti0.26Zr0.07V0.24Mn0.1Ni0.33Mox (x=0-0.1) hydrogen storage alloys

The effect of Al2O3 -coating on Li3V2(PO4)3/C cathode material for lithium-ion batteries has been investigated. The crystalline structure and morphology of the synthesized powders have been characterized by XRD, SEM, and HRTEM, and their electrochemical performances are evaluated by CV, EIS, and galvanostatic charge/discharge tests. It is found that Al2O3 -coating modification stabilizes the structure of the cathode material, decreases the polarization of electrode and suppresses the rise of the surface film resistance. Electrochemical tests indicate that cycling performance and rate capability of Al2O3-coated Li3V2(PO4)3/C are enhanced, especially at high rates. The Al2O3-coated material delivers discharge capacity of 123.03 mAh g−1 at 4 C rate, and the capacity retention of 94.15 % is obtained after 5 cycles. The results indicate that Al2O3 -coating should be an effective way to improve the comprehensive properties of the cathode materials for lithium-ion batteries.

Effect of Al2O3 -coating on the electrochemical performances of Li3V2(PO4)3/C cathode material

Hierarchical porous biochar derived from cotinus coggygria flower by using a novel composite activator for supercapacitors

P2-Na0.67Co0.25Mn0.75-xNbxO2 (x = 0, 0.015, 0.030, 0.045) cathode materials were obtained by a simple solid-state method. The Nb5+-doped effects on ameliorating the structural and electrochemical properties of the Na0.67Co0.25Mn0.75O2 parent material for sodium-ion batteries have been investigated. XRD measurements confirm a hexagonal main phase (P63/mmc) and some trace of orthorhombic NaNbO3 (P21ma). Rietveld refinements exhibit the higher lattice parameters and the bigger c/a values due to Nb5+ doping into the parent Na0.67Co0.25Mn0.75O2. The optimized 3.0 at.% Nb5+-doped P2-Na0.67Co0.25Mn0.75O2 sample delivers the initial discharge capacity of 126.7 mAh g−1 at 0.1 C in the voltage range of 1.8–4.0 V, and its capacity retention is 75.3% after 100 cycles, which is 63.7% higher than that of the pristine. Whereas at 10 C rate, the optimized sample presents the maximal discharge capacity of 72.8 mAh g−1 with an excellent high-rate cycling stability of 91.6% retention after 100 cycles, correspondingly the pristine shows 61.4 mAh g−1 and 73.1% retention. These excellent electrochemical performances are ascribed to better structural stability, and lower charge transfer resistance and higher Na+ diffusion coefficient after Nb5+ doping. Therefore, the Nb5+-doped P2-type cathode materials can be deemed as a beneficial improvement for researches on sodium-ion batteries.

Yanzhi Wang

Papers

Structure and electrochemical characteristics of melted composite Ti0.10Zr0.15V0.35Cr0.10Ni0.30-LaNi5 hydrogen storage alloys

Structures and electrochemical characteristics of Ti0.26Zr0.07V0.24Mn0.1Ni0.33Mox (x=0-0.1) hydrogen storage alloys

Effect of Al2O3 -coating on the electrochemical performances of Li3V2(PO4)3/C cathode material

Hierarchical porous biochar derived from cotinus coggygria flower by using a novel composite activator for supercapacitors

Nb5+-doped P2-type Mn-based layered oxide cathode with an excellent high-rate cycling stability for sodium-ion batteries