Hydrogen desorption properties of Li-N-H system (composed of LiH+LiNH₂) doped with LiBH₄ as catalyst and microwave absorber have been investigated under microwave irradiation. The results showed that pure Li-N-H system can not be heated effectively by microwave irradiation, but it can be rapidly heated up to 500 °C within 5 min with 7.6 wt.% LiBH₄ addition by a microwave heating with a power of 400 W. Further study indicates that it is Li₄BN₃H₁₀ generated during the ball milling process that acts as the microwave absorber and catalyst. Li-N-H+7.6 wt% LiBH₄ by microwave heating desorbed 4.95 wt.% hydrogen which is 3.6 times more than that of Li-N-H +7.6 wt.% graphite by electric resistance heating at 250 °C within 30 min, indicating that the desorption kinetics of Li-N-H system is improved by the combination of the catalytic effect of Li₄BN₃H₁₀ and microwave irradiation. Furthermore, the isothermal kinetics of Li-N-H with 7.6 wt.% LiBH₄ under microwave irradiation were well fitted by Johnson-Mehl-Avrami-Kolmogorov (JMAK) model and the activation energy was 43.9 kJ/mol H₂ which is significantly lower than that under electric resistance heating, demonstrating that the desorption kinetics of Li-N-H with LiBH₄ addition could be effectively improved by microwave irradiation.

研究了在微波辐射下掺杂LiBH ₄作为催化剂和微波吸收剂的Li-NH体系（由LiH + LiNH ₂组成）的氢解吸性能。结果表明，纯Li-NH系统不能通过微波辐射有效加热，但是通过以400 W的功率进行微波加热，添加7.6 wt。％LiBH _4可以在5分钟内将其快速加热到500°C。进一步的研究表明，在球磨过程中产生的Li ₄ BN ₃ H ₁₀充当了微波吸收剂和催化剂。Li-N-H + 7.6 wt％LiBH ₄通过微波加热在250分钟内在30分钟内通过电阻加热解吸了4.95 wt。％的氢，是Li-NH +7.6 wt。％石墨的3.6倍，表明Li-NH系统的解吸动力学得到改善结合Li ₄ BN ₃ H ₁₀的催化作用和微波辐射。此外，Johnson-Mehl-Avrami-Kolmogorov（JMAK）模型很好地拟合了微波辐射下具有7.6 wt。％LiBH ₄的Li-NH的等温动力学，其活化能为43.9 kJ / mol H ₂，远低于在电阻加热条件下，表明Li-NH在LiBH ₄中的解吸动力学 微波辐射可以有效地改善添加量。