HYDROGEN STORAGE ALLOY HAVING THE CONTROLLED ABSORPTION/DESORPTION PRESSURE OF HYDROGEN AND HYDROGEN FUEL SYSTEM USING THE SAME

• Main Authors: TAE JUN PARK, JI HYUK CHOI, JEONG HYUN YOO, IN SU PARK
• Format: Patent
• Language: English; Korean
• Published: 10.05.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention relates to a room-temperature hydrogen storage alloy in which absorption/release pressure of hydrogen is controlled, and a hydrogen fuel system using the same. In accordance with the present invention, a Ti-Zr-Cr-Mn-V-Fe-based hydrogen storage alloy is indicated in a chemical formula of Ti_0.85+aZr_0.15+bCr_0.44-cMn_1.2+dV_0.3+eFe_0.06+fNi_g, wherein a is -0.1 <= a <= 0.1, b is -0.1 <= b <= 0.1, d is -0.2 <= d <= 0.2, e is -0.2 <= e <= 0.2, f is -0.06 <= f <= 0.06, g is 0 <= g <= 0.15, and c is -0.6 <= c=a+b+d+e+f+g <= 0.4, and hydrogen absorption plateau pressure is 10 atm or less at 20℃ to 30℃, and hydrogen release plateau pressure is 2 atm or more at 60℃. Therefore, the present invention is capable of achieving sufficiently high hydrogen storage density. 본 발명은 Ti-Zr-Cr-Mn-V-Fe계 수소 저장 합금에 있어서, Ti0.85+aZr0.15+bCr0.44-cMn1.2+dV0.3+eFe0.06+fNig의 화학식으로 나타내고, 여기서 a는 -0.1 ≤ a ≤ 0.1, b는 -0.1 ≤ b ≤ 0.1, d는 -0.2 ≤ d ≤ 0.2, e는 -0.2 ≤ e ≤ 0.2, f는 -0.06 ≤ f ≤ 0.06, g는 0 ≤ g ≤ 0.15, c는 -0.6 ≤ c=a+b+d+e+f+g ≤ 0.4를 만족하며, 상기 수소 저장 합금은 20 ℃ 내지 30 ℃에서 수소 흡수 평탄압이 10 atm 이하이고, 상기 수소 저장 합금은 60 ℃에서 수소 방출 평탄압이 2 atm 이상인 수소 흡방출 압력이 제어된 상온 수소 저장 합금 및 이를 이용한 수소 연료 시스템에 관한 것이다.