Multi-carbonyl naphthalene diimide polymer as a high-performance cathode for stable lithium-ion storage

Organic materials are emerging candidates for lithium-ion batteries. Unfortunately, limited electrical conductivity and high solubility in organic electrolytes usually cause low capacity and short cycle life, which hinder the utilization of organic materials. Herein, a novel multi-carbonyl naphthalene diimide non-conjugated polymer (NDI-BU) has been readily synthesized through one-step reaction. The designed polymer structure of NDI-BU shows a long and flat discharge platform. The abundant carbonyls provide multiple reaction sites for lithium ions, and resulting in a high specific capacity of 308 mAh·g<sup>–1</sup> at 0.2C. An incredibly long cycle life of 20,000 cycles at 5C with 82% capacity retention is achieved. This work may inspire the effective design strategy for high energy density organic cathode materials.

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Publication Details

Journal
Nano Research Energy
Published
2025-03-13
DOI
https://doi.org/10.26599/nre.2025.9120159
Citations
7
Primary Topic
Advancements in Battery Materials
Type
article
Field-Weighted Citation Impact
5.11

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Multi-carbonyl naphthalene diimide polymer as a high-performance cathode for stable lithium-ion storage

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Multi-carbonyl naphthalene diimide polymer as a high-performance cathode for stable lithium-ion storage

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article en
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Abstract

Organic materials are emerging candidates for lithium-ion batteries. Unfortunately, limited electrical conductivity and high solubility in organic electrolytes usually cause low capacity and short cycle life, which hinder the utilization of organic materials. Herein, a novel multi-carbonyl naphthalene diimide non-conjugated polymer (NDI-BU) has been readily synthesized through one-step reaction. The designed polymer structure of NDI-BU shows a long and flat discharge platform. The abundant carbonyls provide multiple reaction sites for lithium ions, and resulting in a high specific capacity of 308 mAh·g<sup>–1</sup> at 0.2C. An incredibly long cycle life of 20,000 cycles at 5C with 82% capacity retention is achieved. This work may inspire the effective design strategy for high energy density organic cathode materials.

Nano Research EnergyVol. 4(2)
University of California, Los Angeles (US), Zhengzhou University of Light Industry (CN), Henan Energy & Chemical Industry Group (China) (CN), State Key Laboratory of Chemical Engineering (CN), Lanzhou University (CN)
National Natural Science Foundation of China, Zhengzhou University of Light Industry, Zhengzhou University, Education Department of Henan Province
Openalex Percentile: Top 5%
Advancements in Battery Materials
5.11
DOIOpen Access PDFOpenAlex
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