Intermixed Cation–Anion Aqueous Battery Based on an Extremely Fast and Long‐Cycling Di‐Block Bipyridinium–Naphthalene Diimide Oligomer. Issue 25 (27th May 2019)

• Record Type: Journal Article
• Authors: Perticarari, Sofia; Doizy, Tom; Soudan, Patrick; Ewels, Chris; Latouche, Camille; Guyomard, Dominique; Odobel, Fabrice; Poizot, Philippe; Gaubicher, Joel
• Is Part Of: Advanced energy materials. Volume 9:Issue 25(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-27
• Subjects: extended cyclability -- full aqueous battery -- intermixed cation–anion insertion oligomer -- ocean water -- zero carbon additive; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201803688
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: Aqueous batteries, particularly those integrating organic active materials functioning in a neutral pH environment, stand out as highly promising contenders in the stationary electrochemical storage domain, owing to their unparalleled safety, sustainability, and low‐cost materials. Herein, a novel di‐block oligomer, serving as the negative electrode of an all‐organic aqueous battery, is shown to offer exceptional output capabilities. The battery's performance is further enhanced by a unique intermixed p/n‐type storage mechanism, which is able to simultaneously exchange light and naturally abundant Na +, Mg 2+, and Cl − . Reaching up to 105 mAh g −1, this system shows remarkable capacity retention for several thousand cycles (6500 cycles, ≈40 days) in various neutral electrolytes, including raw ocean water (≈3000 cycles, ≈75 days). The surprisingly fast kinetics of this di‐block oligomer allow to attain an unmatched specific capacity of near to 60 mAh g −1 electrode while entirely devoid of conducting additives, and more than 80 mAh g −1 electrode with 10% carbon additive, as well as displaying an areal capacity as high as 3.4 mAh cm −2 at C rate. Full cell validation was demonstrated over 1600 cycles by virtue of a commercial 2, 2, 6, 6‐tétraméthylpipéridin‐1‐yl)oxyl (TEMPO) molecule, which permitted an energy density of close to 40 Wh kg −1 materials at C rate in a self‐pH‐buffered and inexpensive aqueous electrolyte. Abstract : A novel di‐block oligomer of an all‐organic aqueous battery, is shown to offer exceptional output capabilities based on simultaneous exchange of abundant cations and anions. Reaching up to 105 mAh g ‐1, it shows remarkable cyclability for thousands of cycles notably in raw seawater. Its surprisingly fast kinetics allows to attain 60 mAh g ‐1 electrode while entirely devoid of conducting additives.