journal article·2023-06-26

π-Extended Benzo[b]phenazine-Based Polymer Cathode Materials for High-Voltage and Stable Organic Batteries

Minglei Li, Ru Wang, Tingting Wu, Yue Liu, Yuanyuan Chen, Wei He, Shunan Feng, Xiaohong Zhang, Gaole Dai, Yu Zhao

ACS Applied Energy Materials· Volume 6· Issue 12
Publisher page

Abstract

Organic materials are considered potential electrode materials for lithium-ion batteries (LIBs) due to their high theoretical capacity, abundant source, low cost, structure diversity, and environmental friendliness. Herein, we further enhance the discharge voltage and stability by extending the conjugated structure while constructing an active unit based on 5,12-dihydrobenzo[ b ]phenazine (BPZ) and the corresponding polymer p-DPBPZ. p-DPBPZ|Li cells exhibit excellent integral performances with discharge voltages of up to 3.20–3.45 and 3.85–4.25 V (vs Li + /Li), an initial discharge specific capacity of 151 mAh g –1, and energy density and power density of up to 537 Wh kg –1 and 1965 W kg –1, respectively. Meanwhile, the extended conjugated structure can stabilize the redox intermediates by longer delocalization; thus, the battery shows good cycle stability (average decay rate of 0.0087% per cycle at 2C). Moreover, p-DPBPZ has also shown potential as an active material for sodium-ion batteries. Our study provides innovative structures and an effective strategy for constructing high-performance organic electrode materials.
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China

College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, P. R. China

X Energy Systems Co. Ltd., Xiuzhou District, Jiaxing, Zhejiang 314015, P. R. China

Funding

Collaborative Innovation Center of Suzhou Nano Science and Technology · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Higher Education Discipline Innovation Project · Natural Science Foundation of Zhejiang Province · Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province · Joint International Research Laboratory of Carbon-Based Functional Materials and Devices

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