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Metal hydrides: an innovative and challenging conversion reaction anode for lithium-ion batteries.
Beilstein J Nanotechnol 2015; 6:1821-39BJ

Abstract

The state of the art of conversion reactions of metal hydrides (MH) with lithium is presented and discussed in this review with regard to the use of these hydrides as anode materials for lithium-ion batteries. A focus on the gravimetric and volumetric storage capacities for different examples from binary, ternary and complex hydrides is presented, with a comparison between thermodynamic prediction and experimental results. MgH2 constitutes one of the most attractive metal hydrides with a reversible capacity of 1480 mA·h·g(-1) at a suitable potential (0.5 V vs Li(+)/Li(0)) and the lowest electrode polarization (<0.2 V) for conversion materials. Conversion process reaction mechanisms with lithium are subsequently detailed for MgH2, TiH2, complex hydrides Mg2MH x and other Mg-based hydrides. The reversible conversion reaction mechanism of MgH2, which is lithium-controlled, can be extended to others hydrides as: MH x + xLi(+) + xe(-) in equilibrium with M + xLiH. Other reaction paths-involving solid solutions, metastable distorted phases, and phases with low hydrogen content-were recently reported for TiH2 and Mg2FeH6, Mg2CoH5 and Mg2NiH4. The importance of fundamental aspects to overcome technological difficulties is discussed with a focus on conversion reaction limitations in the case of MgH2. The influence of MgH2 particle size, mechanical grinding, hydrogen sorption cycles, grinding with carbon, reactive milling under hydrogen, and metal and catalyst addition to the MgH2/carbon composite on kinetics improvement and reversibility is presented. Drastic technological improvement in order to the enhance conversion process efficiencies is needed for practical applications. The main goals are minimizing the impact of electrode volume variation during lithium extraction and overcoming the poor electronic conductivity of LiH. To use polymer binders to improve the cycle life of the hydride-based electrode and to synthesize nanoscale composite hydride can be helpful to address these drawbacks. The development of high-capacity hydride anodes should be inspired by the emergent nano-research prospects which share the knowledge of both hydrogen-storage and lithium-anode communities.

Authors+Show Affiliations

Laboratoire de Réactivité et Chimie des Solides - LRCS, UMR CNRS-UPJV 7314, 33 rue Saint-Leu, 80039 Amiens, France.Institut de Chimie et des Matériaux Paris-Est - ICMPE, UMR CNRS-UPEC 7182, 2-8 Rue Henri Dunant, 94320 Thiais, France.Laboratoire de Réactivité et Chimie des Solides - LRCS, UMR CNRS-UPJV 7314, 33 rue Saint-Leu, 80039 Amiens, France.

Pub Type(s)

Journal Article
Review

Language

eng

PubMed ID

26425434

Citation

Aymard, Luc, et al. "Metal Hydrides: an Innovative and Challenging Conversion Reaction Anode for Lithium-ion Batteries." Beilstein Journal of Nanotechnology, vol. 6, 2015, pp. 1821-39.
Aymard L, Oumellal Y, Bonnet JP. Metal hydrides: an innovative and challenging conversion reaction anode for lithium-ion batteries. Beilstein J Nanotechnol. 2015;6:1821-39.
Aymard, L., Oumellal, Y., & Bonnet, J. P. (2015). Metal hydrides: an innovative and challenging conversion reaction anode for lithium-ion batteries. Beilstein Journal of Nanotechnology, 6, pp. 1821-39. doi:10.3762/bjnano.6.186.
Aymard L, Oumellal Y, Bonnet JP. Metal Hydrides: an Innovative and Challenging Conversion Reaction Anode for Lithium-ion Batteries. Beilstein J Nanotechnol. 2015;6:1821-39. PubMed PMID: 26425434.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Metal hydrides: an innovative and challenging conversion reaction anode for lithium-ion batteries. AU - Aymard,Luc, AU - Oumellal,Yassine, AU - Bonnet,Jean-Pierre, Y1 - 2015/08/31/ PY - 2014/10/10/received PY - 2015/08/07/accepted PY - 2015/10/2/entrez PY - 2015/10/2/pubmed PY - 2015/10/2/medline KW - conversion reaction KW - lithium-ion batteries KW - metal hydrides SP - 1821 EP - 39 JF - Beilstein journal of nanotechnology JO - Beilstein J Nanotechnol VL - 6 N2 - The state of the art of conversion reactions of metal hydrides (MH) with lithium is presented and discussed in this review with regard to the use of these hydrides as anode materials for lithium-ion batteries. A focus on the gravimetric and volumetric storage capacities for different examples from binary, ternary and complex hydrides is presented, with a comparison between thermodynamic prediction and experimental results. MgH2 constitutes one of the most attractive metal hydrides with a reversible capacity of 1480 mA·h·g(-1) at a suitable potential (0.5 V vs Li(+)/Li(0)) and the lowest electrode polarization (<0.2 V) for conversion materials. Conversion process reaction mechanisms with lithium are subsequently detailed for MgH2, TiH2, complex hydrides Mg2MH x and other Mg-based hydrides. The reversible conversion reaction mechanism of MgH2, which is lithium-controlled, can be extended to others hydrides as: MH x + xLi(+) + xe(-) in equilibrium with M + xLiH. Other reaction paths-involving solid solutions, metastable distorted phases, and phases with low hydrogen content-were recently reported for TiH2 and Mg2FeH6, Mg2CoH5 and Mg2NiH4. The importance of fundamental aspects to overcome technological difficulties is discussed with a focus on conversion reaction limitations in the case of MgH2. The influence of MgH2 particle size, mechanical grinding, hydrogen sorption cycles, grinding with carbon, reactive milling under hydrogen, and metal and catalyst addition to the MgH2/carbon composite on kinetics improvement and reversibility is presented. Drastic technological improvement in order to the enhance conversion process efficiencies is needed for practical applications. The main goals are minimizing the impact of electrode volume variation during lithium extraction and overcoming the poor electronic conductivity of LiH. To use polymer binders to improve the cycle life of the hydride-based electrode and to synthesize nanoscale composite hydride can be helpful to address these drawbacks. The development of high-capacity hydride anodes should be inspired by the emergent nano-research prospects which share the knowledge of both hydrogen-storage and lithium-anode communities. SN - 2190-4286 UR - https://www.unboundmedicine.com/medline/citation/26425434/Metal_hydrides:_an_innovative_and_challenging_conversion_reaction_anode_for_lithium_ion_batteries_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/26425434/ DB - PRIME DP - Unbound Medicine ER -