镁基材料中储氢相及其界面与储氢性能的调控

李谦, 孙璇, 罗群, 刘斌, 吴成章, 潘复生

Regulation of Hydrogen Storage Phase and Its Interface in Magnesium-Based Materials for Hydrogen Storage Performance

LI Qian, SUN Xuan, LUO Qun, LIU Bin, WU Chengzhang, PAN Fusheng

表3 HPT工艺制备的不同镁基亚稳相^[65,67~70]

Table 3 Metastable phases prepared by HPT in different magnesium based systems^[65,67-70]

Metastable phase	Lattice parameter / nm	Decomposition	Hydride	Hydrogen storage	Ref.
		temperature		performance
		K		(mass fraction)
Mg₂Ti	bcc a = 0.345 fcc a = 0.429 hcp-I a = 0.319, c = 0.517 hcp-II a = 0.297, c = 0.514	643	MgH₂,	-	[68]
			TH₂


Mg-50%Zr (atomic fraction)	bcc a = 0.3566 fcc a = 0.44-0.46 hcp a = 0.321, c = 0.516	> 773	-	Absorb: 1.0% (20 s, 303 K, 9 MPa)	[67]
MgVCr	bcc a = 0.295	> 573	-	Absorb 0.9% H₂ and the reversibility is 0.4% at 303 K	[69]
MgV₂Cr	bcc a = 0.294	573	MgH₂	Absorb 0.9% H₂ and the reversibility is 0.4% at 303 K
Mg-V-Sn	b2-type structure a = 0.360	-	-	-	[65]
Mg-V-Pd	b2-type structure a = 0.316	-	-	-
Mg-V-Ni	bcc a = 0.325	-	-	-
Mg-Ni-Pd	bcc-based CsCl-type structure	440	-	0.7% reversible hydrogen	[70]
	a = 0.319			absorption and desorption
				at 305 K