Abstract:
A high-lithium carbonate electrolyte formed from a eutectic carbonate mixture including lithium carbonate and from an additional lithium-containing component adapted to form lithium carbonate during at least one of initial heat up and operation of the fuel cell.
Abstract:
Disclosed are developments in high temperature fuel cells including ionic liquids with high temperature stability and the storage of inorganic acids as di-anion salts of low volatility. The formation of ionically conducting liquids of this type having conductivities of unprecedented magnitude for non-aqueous systems is described. The stability of the di-anion configuration is shown to play a role in the high performance of the non-corrosive proton-transfer ionic liquids as high temperature fuel cell electrolytes. Performance of simple H 2 (g)electrolyte/O 2 (g) fuel cells with the new electrolytes is described. Superior performance both at ambient temperature and temperatures up to and above 200°C are achieved. Both neutral proton transfer salts and the acid salts with HSO - 4 anions, give good results, the bisulphate case being particularly good at low temperatures and very high temperatures. The performance of all electrolytes is improved by the addition of a small amount of involatile base of pK a value intermediate between those of the acid and base that make the bulk electrolyte. The preferred case is the imidazole-doped ethylammonium hydrogensulfate which yields behavior superior in all respects to that of the industry standard phosphoric acid electrolyte.
Abstract:
A high-lithium carbonate electrolyte formed from a eutectic carbonate mixture including lithium carbonate and from an additional lithium-containing component adapted to form lithium carbonate during at least one of initial heat up and operation of the fuel cell.
Abstract:
Disclosed are developments in high temperature fuel cells including ionic liquids with high temperature stability and the storage of inorganic acids as di-anion salts of low volatility. The formation of ionically conducting liquids of this type having conductivities of unprecedented magnitude for non-aqueous systems is described. The stability of the di-anion configuration is shown to play a role in the high performance of the non-corrosive proton-transfer ionic liquids as high temperature fuel cell electrolytes. Performance of simple H2(g)electrolyte/O2(g) fuel cells with the new electrolytes is described. Superior performance both at ambient temperature and temperatures up to and above 200°C are achieved. Both neutral proton transfer salts and the acid salts with HSO 4 anions, give good results, the bisulphate case being particularly good at low temperatures and very high temperatures. The performance of all electrolytes is improved by the addition of a small amount of involatile base of pKa value intermediate between those of the acid and base that make the bulk electrolyte. The preferred case is the imidazole-doped ethylammonium hydrogensulfate which yields behavior superior in all respects to that of the industry standard phosphoric acid electrolyte.
Abstract:
A optionally rechargeable molten nitrate electrolyte battery having an anode comprising lithium, a cathode substrate comprising a conductive metal that is compatible with the nitrate melt, an electrolyte comprising lithium nitrate or lithium nitrate mixtures with other nitrates which is capable of becoming an ionic conductive liquid upon being heated above its melting point, a source of oxygen to provide oxygen for reaction at the cathode or within the melt wherein the oxygen is introduced into the battery through the electrolyte.
Abstract:
High capacity alkali metal/oxygen batteries, e.g. Li/O 2 batteries, employing molten salt electrolytes comprising alkali metal cations and nitrate anions are disclosed. Batteries of the present invention operate at an intermediate temperature ranging from 80° C to 250° C. Molten alkali metal nitrate electrolytes employed in O 2 electrodes within this temperature range provide alkali metal/oxygen batteries having significantly improved efficiency and rechargeability compared to prior art systems.
Abstract translation:高容量碱金属/氧气电池,例如 公开了使用包含碱金属阳离子和硝酸根阴离子的熔盐电解质的Li / O 2电池。 本发明的电池在80℃至250℃的中间温度下操作。在该温度范围内在O 2电极中使用的熔融碱金属硝酸盐电解质提供了与现有技术系统相比显着提高的效率和再充电能力的碱金属/氧电池 。