Conjugated Organophosphorus Materials As Electrodes for Organic Batteries
Recent research in the area of π-conjugated materials has shown that the incorporation of inorganic main group elements – in particular B, Si, and P – is an efficient strategy to obtain materials with intriguing properties for a host of most different practical applications. Our group has of late designed new π-conjugated, ring-fused organophosphorus viologens such as the N,N’-dimethyl-2,7-diazadibenzophosphole oxide (phospha-MV2+, cf. Figure) that show enhanced electronic characteristics for potential battery applications as compared to parent viologen MV2+. The materials’ properties of these compounds have been refined by further modifications of phospa-MV2+ in order to improve the applicability in cathodes and/or anodes. Half-cell cycling studies of fabricated electrodes against lithium metal shed light on the performance of the electrode materials with respect to their capacities under different C-rates for charging/discharging currents, cycle lives, and other performance criteria.
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