Few-Layered Boronic Ester Based Covalent Organic Frameworks/Carbon Nanotube Composites for High-Performance K-Organic Batteries

ACS Nano
Xiudong ChenYong Wang

Abstract

Organic electrodes for low-cost potassium ion batteries (PIBs) are attracting more interest by virtue of their molecular diversity, environmental friendliness, and operation safety. But the sluggish potassium diffusion kinetics, dissolution in organic electrolyte, poor electronic conductivity, and low reversible capacities are several drawbacks compared with inorganic counterparts. Herein, the boronic ester based covalent organic framework (COF) material is successfully prepared on the exterior surface of carbon nanotubes (CNTs) via rational design of the organic condensation reaction and used as an anode material for PIBs. The few-layered structure of COF-10@CNT can provide more exposed active sites and fast K+ kinetics. It exhibits ultrahigh potassium storage performances (large reversible capacities of 288 mAh g-1 after 500 cycles at 0.1 A g-1 and 161 mAh g-1 after 4000 cycles at 1 A g-1), which is superior to previous organic electrodes and most inorganic electrodes. Moreover, the K-storage mechanism is proposed to be π-cation interaction between K+ and conjugated π-electrons of benzene rings.

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Citations

Jun 4, 2019·Advanced Materials·Xiudong ChenYong Wang
Nov 12, 2019·Chemical Communications : Chem Comm·Xing Liu, Guosheng Shi
May 6, 2020·Chemical Society Reviews·Jie LiBo Wang
Jul 9, 2020·Advanced Materials·Yusran YusranValentin Valtchev
Dec 18, 2020·Chemical Society Reviews·Niklas Keller, Thomas Bein
Dec 29, 2020·Chemistry : a European Journal·Weisheng ZhangQichun Zhang
Jul 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sadaf Bashir Khan, Shern-Long Lee
Jul 22, 2021·Chemistry : a European Journal·Ravinder KumarShaikh M Mobin
May 30, 2020·ACS Applied Materials & Interfaces·Kaiqiang ZhangMohammadreza Shokouhimehr
Oct 28, 2019·ACS Applied Materials & Interfaces·Yanyao HuBingan Lu
Aug 7, 2019·ACS Applied Materials & Interfaces·Abdul Khayum MohammedRahul Banerjee
Jan 14, 2020·ACS Applied Materials & Interfaces·Yangyang ZhuZhengping Dong
Jan 16, 2020·Chemical Reviews·Tomooki HosakaShinichi Komaba
Jan 10, 2020·ACS Applied Materials & Interfaces·John J Shea, Chao Luo
Jan 23, 2020·Chemical Reviews·Keyu GengDonglin Jiang
Aug 28, 2021·ACS Applied Materials & Interfaces·Eric R WolfsonPsaras L McGrier
Oct 10, 2021·Advanced Materials·Xiaoguang LiangYoonseob Kim

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