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Effects of unit distance and number on sediment microbial fuel cell stacks for practical power supply
Author(s) -
Yang Yonggang,
Yan Lei,
Lin Xunke,
Li Panxin,
Xu Meiying
Publication year - 2019
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4757
Subject(s) - microbial fuel cell , power density , stack (abstract data type) , power (physics) , internal resistance , electrical engineering , environmental science , electricity generation , engineering , battery (electricity) , computer science , physics , quantum mechanics , programming language
Summary Sediment microbial fuel cells (SMFCs) can covert the biomass and organic matters in sediments into electricity. SMFC stack is an essential way for the application of SMFCs. The unit distance and number will be crucial for SMFC stacks applied in practical environments. This study showed that the power density of individual SMFC increased with the unit distance when compared with SMFCs with a small distance. For hydraulically connected serial stacks, increasing unit distance from 2 to 28 cm decreased the potential loss from 50.4% to 11.3%, but the power output did not increase with either unit distance or number of units due to higher internal resistance and electrode reversal. For hydraulically connected parallel stacks, increasing unit number from one to three multiplied the power output but no further power increase was observed with four and five units, indicating an optimal unit number (OUN) in parallel stacks due to ion conduction. Similar performance was shown when using SMFC stacks to power a light‐emitting diode and an environmental sensor. The results provide important information for improving the power and cost‐effectiveness of SMFC stacks.