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Updated: Jul 3, 2025
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Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
Published on: February 23, 2017
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Island-Like Heterogeneous Interface Generating Tandem Toroidal Built-In Electric Field for Efficient Potassium Ions
Jingyi Liu1, Luwei Zhang1, Kaihang Wang1
1Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|February 14, 2024
Summary
Stable potassium-ion batteries are achieved using a novel TPTG@CuQDs heterostructure. This design prevents material degradation, ensuring long-term battery performance and capacity retention.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Heterostructures in potassium-ion batteries often fail due to interfacial delamination caused by volume expansion during cycling.
- This limits the lifespan and stability of current battery technologies.
Purpose of the Study:
- To develop a stable heterostructure for potassium-ion accommodation.
- To overcome the limitations of existing heterostructures in metal-ion batteries.
Main Methods:
- Constructed a microscopic heterostructure (TPTG@CuQDs) with copper quantum dots (Cu QDs) dispersed on triphenyl-substituted triazine graphdiyne (TPTG) substrates.
- Investigated the electrochemical performance of TPTG@CuQDs as an anode material for potassium-ion batteries.
Main Results:
- The TPTG@CuQDs exhibited island-like structures with tandem toroidal built-in electric fields (BIEF).
- Achieved highly reversible capacity with minimal degradation (0.01% over 5560 cycles at 1 A g⁻¹).
- Demonstrated a full cell capacity of ~110 mAh g⁻¹ over 800 cycles at 1 A g⁻¹.
Conclusions:
- The quantum-scale heterointerface construction strategy enhances battery stability and lifespan.
- TPTG@CuQDs offer a promising approach for advanced metal-ion battery design.
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