The isothermal desorption kinetics of the 1.1MgH2-2LiNH2-0.1LiBH4 system were improved by addition of LaNi4.5Mn0.5 alloy. The hydrogen desorption peak temperature of the sample containing LaNi4.5Mn0.5 reduced by approximately 5 K and the acti-vation energy reduced by 9%. The results of isothermal dehydrogenation kinetics analysis implied that the isothermal desorption process at initial stage was controlled by the phase boundary mechanism. Moreover, the cycle performance of the materials was ex-tended. The growth and agglomeration of the sample particles caused the deterioration of kinetics during de-/hydrogenation cycles, and then resulted in an incomplete desorption/absorption reaction which were responsible for the capacity fading. The cracking and pulverization of LaNi4.5Mn0.5 alloy had an obvious effect on preventing the composites aggregating, and the fine alloy particles could enhance the catalytic effect of the alloy, thus effectively offsetting part of the deterioration of kinetics caused by particles growth.
参考文献
| [1] | Schlapbach L;Züttel A .Hydrogen-storage materials for mobile applications[J].NATURE,2001,414(6861):353. |
| [2] | Oelerich W;Klassen T;Bormann R .Metal oxides as cata-lysts for improved hydrogen sorption in nanocrystalline Mg-based materials[J].Journal of Alloys and Compounds,2001,315(1):237. |
| [3] | Liu, Y.;Liang, C.;Zhou, H.;Gao, M.;Pan, H.;Wang, Q. .A novel catalyst precursor K_2TiF_6 with remarkable synergetic effects of K, Ti and F together on reversible hydrogen storage of NaAlH_4[J].Chemical communications,2011(6):1740-1742. |
| [4] | Y. H. Guo;X. B. Yu;L. Gao;G. L. Xia;Z. P. Guo;H. K. Liu .Significantly improved dehydrogenation of LiBH_4 destabilized by TiF_3[J].Energy & environmental science: EES,2010(4):p.465. |
| [5] | Guang-lin Xia;Hai-ycm Leng;Nai-xin Xu;Zhi-lin Li;Zhu Wu;Jun-lin Du;Xue-bin Yu .Enhanced hydrogen storage properties of LiBH_4 MgH_2 composite by the catalytic effect of MoCl_3[J].International journal of hydrogen energy,2011(12):7128-7135. |
| [6] | LIU Jing,LI Qian.Hydriding/dehydriding behaviors of La2Mg17-10 wt.％Ni composite prepared by mechanical milling[J].稀土学报（英文版）,2013(01):73-78. |
| [7] | Chen P;Xiong ZT;Luo JZ;Lin JY;Tan KL .Interaction of hydrogen with metal nitrides and imides[J].Nature,2002(6913):302-304. |
| [8] | Zhitao Xiong;Guotao Wu;Jianjiang Hu;Ping Chen .Ternary Imides for Hydrogen Storage[J].Advanced Materials,2004(17):1522-1525. |
| [9] | Xiong Z T;Hu JJ;Wu G T;Chen P Luo W F Cross K Wang J .Thermodynamic and kinetic investigations of the hydrogen storage in the Li-Mg-N-H system[J].Journal of Alloys and Compounds,2005,398(1):235. |
| [10] | Jianhui Wang;Tao Liu;Guotao Wu .Potassium-Modified Mg(NH2)2/2 LiH System for Hydrogen Storage[J].Angewandte Chemie,2009(32):5828-5832. |
| [11] | Chao Li;Yongfeng Liu;Yuepeng Pang;Yingjie Gu;Mingxia Gao;Hongge Pan .Compositional effects on the hydrogen storage properties of Mg(NH_2)_2-2LiH-xKH and the activity of KH during dehydrogenation reactions[J].Dalton transactions: An international journal of inorganic chemistry,2014(6):2369-2377. |
| [12] | Li C;Liu Y F;Ma R J;Zhang X Li Y Gao M X Pan H G .Superior dehydrogenation/hydrogenation kinetics and long-term cycling performance of K and Rb cocatalyzed Mg(NH2)2-2LiH system[J].Appl Mater Interfaces,2014,6(19):17024. |
| [13] | Chu Liang;Yongfeng Liu;Mingxia Gao .Understanding the role of K in the significantly improved hydrogen storage properties of a KOH-doped Li-Mg-N-H system[J].Journal of Materials Chemistry, A. Materials for energy and sustainability,2013(16):5031-5036. |
| [14] | Yongfeng Liu;Chao Li;Bo Li .Metathesis Reaction-Induced Significant Improvement in Hydrogen Storage Properties of the KF-Added Mg(NH2)2-2LiH System[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2013(2):866-875. |
| [15] | Chao Li;Yongfeng Liu;Yanjing Yang .High-temperature failure behaviour and mechanism of K-based additives in Li-Mg-N-H hydrogen storage systems[J].Journal of Materials Chemistry, A. Materials for energy and sustainability,2014(20):7345-7353. |
| [16] | Bo Li;Yongfeng Liu;Chao Li .In situ formation of lithium fast-ion conductors and improved hydrogen desorption properties of the LiNH2-MgH2 system with the addition of lithium halides[J].Journal of Materials Chemistry, A. Materials for energy and sustainability,2014(9):3155-3162. |
| [17] | Li C;Liu Y F;Gu Y J;Gao M X Pan H G .Improved hy-drogen-storage thermodynamics and kinetics for an RbF-doped Mg(NH2)2-2LiH system[J].Chemistry-An Asian Journal,2013,8(9):2136. |
| [18] | Chu Liang;Yongfeng Liu;Zhijun Wei;Ying Jiang;Fan Wu;Mingxia Gao;Hongge Pan .Enhanced dehydrogenation/hydrogenation kinetics of the Mg(NH_2)_2 2LiH system with NaOH additive[J].International journal of hydrogen energy,2011(3):2137-2144. |
| [19] | 朱惜林,韩树民,赵鑫,李媛,刘宝忠.Effect of lanthanum hydride on microstructures and hydrogen storage performances of 2LiNH2-MgH2 system[J].稀土学报（英文版）,2014(05):429-433. |
| [20] | Shahi R R;Yadav T P;Shaz M A;Srivastva O N .Studies on dehydrogenation characteristic of Mg(NH2)2/LiH mix-ture admixed with vanadium and vanadium based catalysts(V,V2O5 and VCl3)[J].International Journal of Hydrogen Energy,2010,35(1):238. |
| [21] | Ma L P;Wang P;Dai H B;Cheng H M .Catalytically en-hanced dehydrogenation of Li-Mg-N-H hydrogen storage material by transition metal nitrides[J].Journal of Alloys and Compounds,2009,468(1):L21. |
| [22] | Cao, H.;Zhang, Y.;Wang, J.;Xiong, Z.;Wu, G.;Qiu, J.;Chen, P. .Effects of Al-based additives on the hydrogen storage performance of the Mg(NH_2)_2-2LiH system[J].Dalton transactions: An international journal of inorganic chemistry,2013(15):5524-5531. |
| [23] | Bo Li;Yongfeng Liu;Jian Gu;Yingjie Gu;Mingxia Gao;Hongge Pan .Mechanistic investigations on significantly improved hydrogen storage performance of the Ca(BH_4)_2-added 2LiNH_2/MgH_2 system[J].International journal of hydrogen energy,2013(12):5030-5038. |
| [24] | Bo Li;Yongfeng Liu;Jian Gu;Mingxia Gao;Hongge Pan .Synergetic Effects of In Situ Formed CaH_2 and LiBH_4 on Hydrogen Storage Properties of the Li-Mg-N-H System[J].Chemistry, an Asian journal,2013(2):374-384. |
| [25] | Pan, H.;Shi, S.;Liu, Y.;Li, B.;Yang, Y.;Gao, M. .Improved hydrogen storage kinetics of the Li-Mg-N-H system by addition of Mg(BH_4)_2[J].Dalton transactions: An international journal of inorganic chemistry,2013(11):3802-3811. |
| [26] | Yang J;Sudik A;Siegel D J;Halliday D Drews A Carter III R O Wolverton C Lewis G J Sachtler J WA Low J J Faheem S A Lesch D A Ozolins V .Hydrogen storage properties of 2LiNH2+LiBH4+MgH2[J].Journal of Alloys and Compounds,2007,446:345. |
| [27] | Jun Yang;Andrea Sudik;Donald J. Siegel .A Self-Catalyzing Hydrogen-Storage Material[J].Angewandte Chemie,2008(5):882-887. |
| [28] | Sudik A;Yang J;Halliday D;Wolverton C .Hydrogen storage properties in (LiNH2)(2)-LiBH4-(MgH2)(X) mixtures (X=0.0-1.0)[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2008(11):4384-4390. |
| [29] | Jianjiang Hu;Maximilian Fichtner;Ping Chen .Investigation on the Properties of the Mixture Consisting of Mg(NH2)2, LiH, and LiBH4 as a Hydrogen Storage Material[J].Chemistry of Materials: A Publication of the American Chemistry Society,2008(22):7089-7094. |
| [30] | Sesha S. Srinivasan;Michael U. Niemann;Jason R. Hattrick-Simpers;Kimberly McGrath;Prakash C. Sharma;D. Yogi Goswami;Elias K. Stefanakos .Effects of nano additives on hydrogen storage behavior of the multinary complex hydride LiBH_4/LiNH_2/MgH_2[J].International journal of hydrogen energy,2010(18):9646-9652. |
| [31] | Xugang Zhang;Zhinian Li;Fang Lu;Hualing Li;Jing Mi;Shumao Wang;Xiaopeng Liu;Lijun Jiang .Improved hydrogen storage performance of the LiNH_2-MgH_2-LiBH_4 system by addition of ZrCo hydride[J].International journal of hydrogen energy,2010(15):7809-7814. |
| [32] | Alexander Pohl;Shumao Wang;Jianjiang Hu .Additive Effects of LiBH4 and ZrCoH3 on the Hydrogen Sorption of the Li-Mg-N-H Hydrogen Storage System[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2012(38):20246-20253. |
| [33] | Zaluski L;Zaluska A;Str?m-Olsen J O .Nanocrystalline metal hydrides[J].Journal of Alloys and Compounds,1997,253:70. |
| [34] | Luo W F;R?nnebro E .Towards a viable hydrogen storage system for transportation application[J].Journal of Alloys and Compounds,2005,404:392. |
| [35] | Kissinger H E .Reaction kinetics in differential thermal analysis[J].Analytical Chemistry,1957,29(11):1702. |
| [36] | Avrami M .Kinetics of phase change II transformation-time relations for random distribution of nuclei[J].Journal of Chemical Physics,1940,8(2):212. |
| [37] | Hancock J D;Sharp J H .Method of comparing solid-state kinetic data and its application to the decomposition of kaolinite,brucite,and BaCO3[J].Journal of the American Ceramic Society,1972,55(2):74. |
| [38] | Chen P;Xiong ZT;Yang LF;Wu GT;Luo WF .Mechanistic investigations on the heterogeneous solid-state reaction of magnesium amides and lithium hydrides[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(29):14221-14225. |
| [39] | Luo W F;Stewart K .Characterization of NH3 formation in desorption of Li-Mg-N-H storage system[J].J Alloys Com-pd,2007,440(1):357. |
| [40] | Jianjiang Hu;Yongfeng Liu;Guotao Wu .Improvement of Hydrogen Storage Properties of the Li-Mg-N-H System by Addition of LiBH4[J].Chemistry of Materials: A Publication of the American Chemistry Society,2008(13):4398-4402. |
| [41] | Meisner G P;Scullin M L;Balogh M P;Pinkerton F E Meyer M S .Hydrogen release from mixtures of lithium borohydride and lithium amide:a phase diagram study[J].Journal of Physical Chemistry B,2006,110(9):4186. |
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