Toward all organic Li-ion batteries Study of polycarbonyl materials J. Geng, M. Armand, J-P. Bonnet, J-M. Tarascon, F. Dolhem, P. Poizot Laboratoire de Réactivité et Chimie des Solides, UMR 6007 & Laboratoire des Glucides, UMR 6219, Université de Picardie Jules Verne, 33 rue Saint-Leu, 80039 Amiens, France. email@example.com Main goal : Synthesis, characterization and study of the electrochemical properties of organic compounds, able to act as electrodes for Li-ion batteries. Load Energy storage (using batteries) constitutes one of the main columns to renewable energies and make part of our well-being (portable electronic devices, hybrid electric vehicules (HEV) and Non-aqueous + Liquid electrolyte - electric vehicules.(EV) Li+ Li-ion batteries constitute an attractive technology for electricity storage. However they are based on the use of non renewable electroactive materials (e.g. LiCoO2, LiNiO2, LiFePO4). Li+ The life cycle analysis of such inorganic-based electrode materials (extraction, processing and recycling) shows a negative impact on the environment. A more “sustainable” Li-ion battery could be foreseen in the synthesis of new active Positive Negative electrode electrode materials produced from organic renewable resources and via eco-efficient processes1,2 . Piperazine tetrones Diquinoxalino phenazine Use of carbonyl (C=O) groups as RedOx centers and Use of pyrazine ring as a RedOx center. influence by the incorporation of nitrogen atom in the ring. 3.2 Synthesis of diallyl-piperazine tetrone3 (AP) and oligomer (p-AP) via Acyclic Diene Metahetsis (ADMET). 3 N AP p-AP 2.8 0 E / V vs. Li /Li O O O O N N 2.6 + [M] 2.4 N N N N + C 2H4 N N 2.2 O O n N O O 2 [M] : Grubbs 1st generation; Grubbs 2nd generation; Hoveyda Grubbs 2nd generation; WCl6/SnBu4/AcOPr. Conditions : inert atmosphere; anhydrous solvents (1,2-DCE; 1.8 toluene;1,2,4-TCB); Temparature (60-110°C); time of reaction (4 – 24h); 2 – 5%mol/mol 0 20 40 60 80 100 catalyst / substrate. Q (mA.h/g) 3.2 POE cell type : Li metal disc as negative electrode, a POE/LiClO4 as separator, Powder hand milled: 50%active material + 10%carbon Ketjen Black + 40%POE(100000 Mw). 5- 3 15 of active material is used. Electron exchange rate 1e- /10h. 2.8 0 E/ V vs. Li /Li Tetrahydroxy-1,4-quinone derivatives + 2.6 2.4 Use of carbonyl (C=O) groups as RedOx centers. 4 2.2 2 O AP 3.5 p-AP 0 MeO OMe E / V vs. Li /Li 1.8 + 0 50 100 150 200 3 Q (mA.h/g) Swagelock type cell : Li metal disc as negative electrode, a Whatmann GF/D as MeO OMe separator, saturated in LP30 as electrolyte . Powder hand milled: active material + 2.5 50%(w/w) carbon SP. 10-12 of powder is used. Electron exchange rate 1e- /10h. O 2 Conclusions and perspectives 0 50 Q (mA.h/g) 100 150 Carbonyl RedOx potential can be tuned. Swagelock type cell : Li metal disc as negative electrode, a Whatmann GF/D as Materials tested display low polarization and good average separator, saturated in LP30 as electrolyte . Powder hand milled: active material + 50%(w/w) carbon SP. 10-12 of powder is used. Electron exchange rate 1e- /10h. potential. Main drawback of organic compounds is the solubility in the electrolyte, but it can be solved by increasing the molecular 1.H. Chen, M. Armand, G. Demailly, F. Dolhem, P. Poizot, weight (polymers) or increasing the negative charge (lithium J-M. Tarascon, ChemSusChem, 4, 2008, 348-355. salts). 2. H. Chen, et al. J. Am. Chem. Soc., 2009, 131 (25), pp 8984–8988 3.T. Umemoto; US 6737193 B3 ; May 2004.
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