Conjugated microporous polyimide cathodes for sodium/lithium-ion batteries with ultra-long cycling performance

Crystal transformation of metal compound cathodes during charge/discharge processes in alkali metal‐ion batteries usually generates profound impact on structural stability and electrochemical performance, while the theme in anode materials, which always occurs and completes during the first redox cycle, is rarely explored probably due to the fast transformation dynamics. Herein, for the first time, a unique crystal transformation behavior with slow dynamics in anode of sodium‐ion batteries (SIBs) is reported, which further promotes electrochemical performance. Specifically, irreversible γ → β crystal transformation of In2Se3 is observed, induced by the persistent size degradation of In2Se3 particles during repeated sodiation/desodiation, supported by a series of ex situ characterizations, such as HRTEM, XRD, and XPS of γ‐In2Se3/reduced graphene oxide (γ‐In2Se3@rGO) nanocomposite. The hybrid electrode shows ultrahigh long‐term cycling stability (378 mA h g−1 at 1.0 A g−1 after 1000 cycles) and excellent rate capability (272 mA h g−1 at 20.0 A g−1). Full battery with Na3V2(PO4)3 cathode also manifests superior performance, promising β‐In2Se3 dominated electrode materials in high‐power and long‐life SIBs. The first‐principle calculations suggest the crystal transformation enhances electric conductivity of β‐In2Se3 and facilitates its accessibility to sodium. In combination with the synergistic effect between rGO matrix, substantially enhanced electrochemical performance is realized.

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Synergistic γ‐In₂Se₃@rGO Nanocomposites with Beneficial Crystal Transformation Behavior for High‐Performance Sodium‐Ion Batteries

Zhao

Zhang

et al. 2023

Advanced Science

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Advanced characterization techniques for phosphate cathodes in aqueous rechargeable zinc‐based batteries

Zhou,

Li,

Peng

et al. 2024

Carbon Energy

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Aqueous zinc‐based batteries are emerging as highly promising alternatives to commercially successful lithium‐ion batteries, particularly for large‐scale energy storage in power stations. Phosphate cathodes have garnered significant research interest owing to their adjustable operation potential, electrochemical stability, high theoretical capacity, and environmental robustness. However, their application is impeded by various challenges, and research progress is hindered by unclear mechanisms. In this review, the various categories of phosphate materials as zinc‐based battery cathodes are first summarized according to their structure and their corresponding electrochemical performance. Then, the current advances to reveal the Zn2+ storage mechanisms in phosphate cathodes by using advanced characterization techniques are discussed. Finally, some critical perspectives on the characterization techniques used in zinc‐based batteries and the application potential of phosphates are provided. This review aims to guide researchers toward advanced characterization technologies that can address key challenges, thereby accelerating the practical application of phosphate cathodes in zinc‐based batteries for large‐scale energy storage.

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p/n‐Type Polyimide Covalent Organic Frameworks for High‐Performance Cathodes in Sodium‐Ion Batteries

Jindal,

Tian,

Mallick

et al. 2024

Small

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Covalent organic frameworks (COFs) are viewed as promising organic electrode materials for metal‐ion batteries due to their structural diversity and tailoring capabilities. In this work, firstly using the monomers N,N,N′,N′‐tetrakis(4‐aminophenyl)‐1,4‐phenylenediamine (TPDA) and terephthaldehyde (TA), p‐type phenylenediamine‐based imine‐linked TPDA‐TA‐COF is synthesized. To construct a bipolar redox‐active, porous and highly crystalline polyimide‐linked COF, i.e., TPDA‐NDI‐COF, n‐type 1,4,5,8‐naphthalene tetracarboxylic dianhydride (NDA) molecules are incorporated into p‐type TPDA‐TA‐COF structure via postsynthetic linker exchange method. This tailored COF demonstrated a wide potential window (1.03.6 V vs Na+/Na) with dual redox‐active centers, positioning it as a favorable cathode material for sodium‐ion batteries (SIBs). Owing to the inheritance of multiple redox functionalities, TPDA‐NDI‐COF can deliver a specific capacity of 67 mAh g−1 at 0.05 A g−1, which is double the capacity of TPDA‐TA‐COF (28 mAh g−1). The incorporation of carbon nanotube (CNT) into the TPDA‐NDI‐COF matrix resulted in an enhancement of specific capacity to 120 mAh g−1 at 0.02 A g−1. TPDA‐NDI‐50%CNT demonstrated robust cyclic stability and retained a capacity of 92 mAh g−1 even after 10 000 cycles at 1.0 A g−1. Furthermore, the COF cathode exhibited an average discharge voltage of 2.1 V, surpassing the performance of most reported COF as a host material.

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Conjugated microporous polyimide cathodes for sodium/lithium-ion batteries with ultra-long cycling performance

Cited by 16 publications

References 62 publications

Synergistic γ‐In₂Se₃@rGO Nanocomposites with Beneficial Crystal Transformation Behavior for High‐Performance Sodium‐Ion Batteries

Synergistic γ‐In₂Se₃@rGO Nanocomposites with Beneficial Crystal Transformation Behavior for High‐Performance Sodium‐Ion Batteries

Advanced characterization techniques for phosphate cathodes in aqueous rechargeable zinc‐based batteries

p/n‐Type Polyimide Covalent Organic Frameworks for High‐Performance Cathodes in Sodium‐Ion Batteries

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Conjugated microporous polyimide cathodes for sodium/lithium-ion batteries with ultra-long cycling performance

Cited by 16 publications

References 62 publications

Synergistic γ‐In2Se3@rGO Nanocomposites with Beneficial Crystal Transformation Behavior for High‐Performance Sodium‐Ion Batteries

Synergistic γ‐In2Se3@rGO Nanocomposites with Beneficial Crystal Transformation Behavior for High‐Performance Sodium‐Ion Batteries

Advanced characterization techniques for phosphate cathodes in aqueous rechargeable zinc‐based batteries

p/n‐Type Polyimide Covalent Organic Frameworks for High‐Performance Cathodes in Sodium‐Ion Batteries

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Product

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Synergistic γ‐In₂Se₃@rGO Nanocomposites with Beneficial Crystal Transformation Behavior for High‐Performance Sodium‐Ion Batteries

Synergistic γ‐In₂Se₃@rGO Nanocomposites with Beneficial Crystal Transformation Behavior for High‐Performance Sodium‐Ion Batteries