High-Performance Organic Lithium Batteries with an Ether-Based Electrolyte and 9,10-Anthraquinone (AQ)/CMK-3 Cathode.

Kai Zhang,Zhiqiang Niu,Jun Chen,Qing Zhao,Chunyang Guo

doi:10.1002/advs.201500018

Abstract

Organic carbonyl electrode materials of lithium batteries have shown multifunctional molecule design and high capacity, but have the problems of poor cycling and low rate performance due to their high solubility in traditional carbonate‐based electrolytes and low conductivity. High‐performance organic lithium batteries with modified ether‐based electrolyte (2 m LiN(CF3SO2)2 in 1,3‐dioxolane/dimethoxyethane solvent with 1% LiNO3 additive (2m‐DD‐1%L)) and 9,10‐anthraquinone (AQ)/CMK‐3 (AQC) nanocomposite cathode are reported here. The electrochemical results manifest that 2m‐DD‐1%L electrolyte promotes the cycling performance due to the restraint of AQ dissolution in ether‐based electrolyte with high Li salt concentration and formation of a protection film on the surface of the anode. Additionally, the AQC nanocomposite improves the rate performance because of the nanoconfinement effect of CMK‐3 and the decrease of charge transfer impedance. In 2m‐DD‐1%L electrolyte, AQC nanocomposite delivers an initial discharge capacity of 205 mA h g−1 and a capacity of 174 mA h g−1 after 100 cycles at 0.2 C. Even at a high rate of 2 C, its capacity is 146 mA h g−1. This strategy is also used for other organic carbonyl compounds with quinone substructures and they maintain high stable capacities. This sheds light on the development of advanced organic lithium batteries with carbonyl electrode materials and ether‐based electrolytes.

Highlights

In 2M-DD-1%L electrolyte, AQ/ CMK-3 (AQC) nanocomposite delivers an initial discharge capacity of 205 mA h g−1 and a capacity of 174 mA h g−1 after 100 cycles at 0.2 C
The results demonstrate that our proposed strategy is to further expand the development of organic lithium batteries with the combination of ether-based electrolyte and carbon-based nanocomposite cathode
The cycling performance of BHNQ is better than that of previous report[22] as summarized in Table S2, Supporting Information. This manifests the wide applicability of combining 2M-DD-1%L electrolyte with CMK-3-based nanocomposites as an effective way for the improvement of electrode performance of organic carbonyl compounds with quinone substructures

Summary

Introduction

10−3 S cm−1, the contact between electrolytes and electrode materials is still poor,[17] leading to inferior. The modification of the electrode mainly includes molecular high capacity, molecule-level controllable design, and resource design and enveloping organic materials in carbon framesustainability.[1,2,3,4,5,6,7,8,9,10] organic carbonyl compounds work. Li salt (lithium 3,6-dioxocyclohexa-1,4-diene-1,4-bis(olate), Li2C6H2O4), the theoretical specific capacity decreases from 496 to 353 mA h g−1.[11] After polymerization, the theoretical We report on high-performance organic lithium batteries with modified ether-based electrolyte and AQ/ CMK-3 (AQC) nanocomposite cathode. The results demonstrate that our proposed strategy is to further expand the development of organic lithium batteries with the combination of ether-based electrolyte and carbon-based nanocomposite cathode

Results and Discussions

Conclusion

Experimental Section