Polypyrrole as an ultrafast organic cathode for dual-ion batteries

Sun, Tao; Sun, Quan; Yu, Yue; Zhang, Xinbo

doi:10.1016/j.esci.2021.11.003

Cited by 51 publications

(35 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Along with the increase of scan rate, the capacitive contribution increases and finally reaches about 73% at 0.5 mV s –1 (Figures g and S19), which contributes to the superior rate capability. In addition, such a fast reaction kinetics was further investigated by galvanostatic intermittent titration technique (GITT) (Figure h,i), − where the ion diffusion coefficient ( D ion ) based on H + uptake/removal (∼10 –11 cm 2 s –1 ) is about 2 orders of magnitude higher than that of the Zn 2+ coordination/incoordination reaction (∼10 –13 cm 2 s –1 ). Therefore, the H + uptake/removal endows aqueous Zn/BQPH batteries with enhanced reaction kinetics.…”

Section: Resultsmentioning

confidence: 99%

An Air-Rechargeable Zn/Organic Battery with Proton Storage

et al. 2022

View full text Add to dashboard Cite

Air-rechargeable zinc batteries are a promising candidate for self-powered battery systems since air is ubiquitous and cost-free. However, they are still in their infancy and their electrochemical performance is unsatisfactory due to the bottlenecks of materials and device design. Therefore, it is of great significance to develop creative air-rechargeable Zn battery systems. Herein, an air-rechargeable Zn battery with H+-based chemistry was developed in a mild ZnSO4 electrolyte for the first time, where benzo[i]benzo[6,7]quinoxalino[2,3-a]benzo[6,7]quinoxalino[2,3-c]phenazine-5,8,13,16,21,24-hexaone (BQPH) was employed as cathode material. In this Zn/BQPH battery, a Zn2+ coordination with adjacent CO and CN groups leads to an inhomogeneous charge distribution in the BQPH molecule, which induces the H+ uptake on the remaining four pairs of the CO and CN groups in subsequent discharge processes. Interestingly, the large potential difference between the discharged cathode of the Zn/BQPH battery and oxygen triggers the redox reaction between them spontaneously, in which the discharged cathode can be oxidized by oxygen in air. In this process, the cathode potential will gradually rise along with H+ removal, and the discharged Zn/BQPH battery can be air-recharged without an external power supply. As a result, the air-rechargeable Zn/BQPH batteries exhibit enhanced electrochemical performance by fast H+ uptake/removal. This work will broaden the horizons of air-rechargeable zinc batteries and provide a guidance to develop high-performance and sustainable aqueous self-powered systems.

show abstract

Section: Resultsmentioning

confidence: 99%

An Air-Rechargeable Zn/Organic Battery with Proton Storage

et al. 2022

View full text Add to dashboard Cite

show abstract

“…First, PPy has strong polar-polar interactions with LPS due to its unique chain structure and the electron-rich pyrrolic group in PPy. 28 Moreover, the redox potential of PPy (2.5 V vs. Li/Li + ) is within the potential window of sulfur discharge. Therefore, PPy not only acts as an electrically conducting agent, but also contributes to the capacity of Li-S batteries.…”

Section: Introductionmentioning

confidence: 92%

PPy-constructed core–shell structures from MOFs for confining lithium polysulfides

Geng¹,

Du²,

Wu³

et al. 2022

Inorg. Chem. Front.

View full text Add to dashboard Cite

show abstract

“…Organic materials, with structural diversity, reasonable sustainability, tunable properties, and possible high capacity/high energy density, have been demonstrated as potential candidates for next generation LIBs. 8,9,[16][17][18][19][20] Many types of organic materials containing different redox active centers (carbonyls, nitriles, radicals, imine compounds, etc.) have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%