Journal Article

FZJ-2020-00823

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Efficient Area Matched Converter Aided Solar Charging of Lithium Ion Batteries Using High Voltage Perovskite Solar Cells

Kin, L.-c.FZJ* ; Liu, Z.FZJ* ; Astakhov, O.FZJ* ; Agbo, S. N.FZJ* ; Tempel, H.FZJ* ; Yu, S.FZJ* ; Kungl, H.FZJ* ; Eichel, R.-A.FZJ* ; Rau, U.FZJ* ; Kirchartz, T.FZJ* ; Merdzhanova, T. (Corresponding author)FZJ*

2020
ACS Publications Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsaem.9b01672

Abstract: Efficient solar charging of a battery has been demonstrated in the past by sizing batteries many times that of a solar cell to reduce the effective current density experienced by the battery. Although efficient, such a strategy of coupling a battery up to 10 times larger with a solar cell will make solar–battery integration more challenging and limit the size, and thus maximum power output, of an integrated device. Area matched LFP-LTO (lithium iron phosphate, lithium titanate) battery solar charging using high voltage lead halide perovskite solar cells with a boost converter gave a maximum overall efficiency of 9.9% and a high 14.9% solar to battery charging efficiency. Two differently sized systems were compared using the same converter, and an exergy analysis was performed, showing limitations of converter usage in solar-powered internet of things (IoT) devices and size dependent battery losses.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)
2. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 121 - Solar cells of the next generation (POF3-121) (POF3-121)
2. 131 - Electrochemical Storage (POF3-131) (POF3-131)

Appears in the scientific report 2020

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