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Lithium-air battery is a new type of metal-air battery, its theoretical energy density is 5200Wh/kg, high battery system has 1 to 2 orders of magnitude, and it can fully meet the future power energy density requirements of electric vehicles (700 Wh/kg). .
Under the support of the Chinese Academy of Sciences, the National Natural Science Foundation of China, the Shandong Province Jieqing Fund and the Qingdao Key Laboratory of Solar Energy Storage Technology, the Biomimetic Energy and Energy Storage Systems Team of the Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences is at the cathode of lithium-air batteries. A series of new advances have been made in the study of key materials, and the relevant research results have been published in the journal Chem. Commun., J. Phys. Chem. C, ChemSusChem., Coordin. Chem. Rev., and in electrolytes, electrode material systems, and liquid flows. A number of patents have been applied for battery structural design (a patent for the electrolyte system material (ZL 200910249811.4) has been authorized).
In view of the two core problems of low charge and discharge energy conversion efficiency and short depth of discharge cycle life of lithium-air batteries, the team has developed a series of high-efficiency lithium-air battery cathode materials based on nitride materials and materials and structural design. (CN 102646839 A; CN 102034985 A). Nitride transition metal (such as MoN, etc.) is similar to noble metal Pt due to its outer electron arrangement, and exhibits stable and good catalytic activity at the interface of organic electrolyte system. Through the structure-activity relationship study, the team designed and constructed a high-performance lithium-air battery cathode with nanocomposite structure, successfully reduced the charge and discharge polarization of the battery, and improved the energy conversion efficiency (Chem. Commun., 2011, 47, 11291- 11293; ChemSusChem, 2012, 5, 1712-1715).
At the same time, aiming at the problems of short cycle life of lithium air batteries, the team designed and synthesized a Co3Mo3N ternary material with double-effect catalytic performance by introducing Co into nitride materials, and constructed a mesoporous nano-cathode based on this material. The cycle life of lithium-air batteries at deep discharge is improved (J. Phys. Chem. C, 2013, 117, 858-865). In addition, through the structural design of the flow battery, the contamination of the electrode interface with the inactive material can be greatly eliminated, and the cycle life can be improved by 70% through the design of the organic-inorganic hybrid electrolyte system (CN 102637890 A).
Based on the above studies, the team published an article in Coordin. Chem. Rev., which reviewed the application of nitride nanomaterials in energy storage, especially in lithium air high energy batteries, and focused on the analysis of nitrides in lithium air battery applications. Problems, solutions and broad prospects.
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