Reversible lithium storage behaviour of aromatic diimide dilithium carboxylates
2016
Veerababu, M | Varadaraju, UV | Kothandaraman, R
Electrochemical lithiation/delithiation studies are carried out on three different aromatic diimide lithium carboxylates. Among all, naphthalene diimide based dilithium carboxylate delivers a remarkably stable capacity of 134mAhg⿿¹ at 2.24V vs. Li/Li⁺ over 125 cycles with a low polarization of 50mV. A striking feature is that, the lithiation/delithiation process is biphasic with excellent plateau behaviour in the voltage-composition profile. DFT calculations confirm the lower band gap and higher electron affinity for this compound.
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