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Elektrochemische Energiespeicherung
Author(s) -
Allmendinger Thomas
Publication year - 1991
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330630504
Subject(s) - accumulator (cryptography) , hydraulic accumulator , energy storage , supercapacitor , photovoltaic system , chemical energy , process engineering , electrochemical energy conversion , regenerative fuel cell , hydrogen storage , electricity generation , environmental science , electrochemistry , fuel cells , materials science , hydrogen fuel , hydrogen , computer science , electrical engineering , engineering , power (physics) , chemistry , chemical engineering , mechanical engineering , electrode , physics , organic chemistry , algorithm , quantum mechanics
Electrochemical storage of energy. Besides energy density, performance density, and lifetime, the overall efficiency represents a very important criterion for electro‐chemical energy storage systems and influences the costs significantly. The system electrolyser – hydrogen storage – fuel cell exhibits an overall efficiency of about 1/3, half as much as an accumulator. On the other hand, it favours long term storage of energy. Organic liquids, especially methanol which can be synthesised by CO 2 hydrogenation, seem to be the most promising mode of storing hydrogen. No optimal system is available yet for the short‐ or mid‐term storage of photovoltaic solar energy in buildings. Connection to the public mains will be the best approach. For special purposes like emergency power sources or load levelling systems the lead accumulator is still interesting. However, electrochemical storage systems exhibit the most promise for energy saving as mobile power sources such as improved accumulators or in the longer term as fuel cells, e. g. for electrically driven vehicles. Some relevant options are outlined.