Aqueous zinc-ion batteries(AZIBs)offer promising safety and affordability,but suffer from dendritic Zn growth and parasitic side reactions at the electrode-electrolyte interface.Herein,we construct a dual-region inter...Aqueous zinc-ion batteries(AZIBs)offer promising safety and affordability,but suffer from dendritic Zn growth and parasitic side reactions at the electrode-electrolyte interface.Herein,we construct a dual-region interfacial modulation framework by molecularly reconfiguring the Helmholtz double layer via trace methyl methacrylate(MMA).Exploiting its amphiphilic and functionally asymmetric architecture,MMA enables a coordinated interfacial reconstruction that disrupts Zn^(2+)solvation in the outer Helmholtz plane,builds a chemisorbed coordination layer in the inner plane,and modulates local interfacial chemistry with spatial precision.This dualregion regulation collectively suppresses water reactivity,facilitates Zn^(2+)desolvation,and drives crystallo-graphically preferred deposition along the(101)plane,promoting lateral growth and mitigating dendrite for-mation.As a result,symmetric Zn||Zn cells exhibit over 4200 h of stable cycling at 1 mA cm^(-2) and maintain 1100 h of operation at 2 mA cm^(-2),even at 0℃.Zn||Ti half-cells achieve a Coulombic efficiency of 99.83%,while Zn||NH_(4)V_(4)O_(10) full cells deliver 93.92%capacity retention after 400 cycles at 2 A g^(-1),and preserve 85.3%after 300 cycles at 0℃.This work demonstrates a scalable,mechanism-driven electrolyte design paradigm for dendrite-free and high-performance aqueous Zn metal batteries.展开更多
The rapid development of the aerospace and nuclear industries is accompanied by increased exposure to high-energy ionising radiation.Thus,the performance of radiation shielding materials needs to be improved to extend...The rapid development of the aerospace and nuclear industries is accompanied by increased exposure to high-energy ionising radiation.Thus,the performance of radiation shielding materials needs to be improved to extend the service life of detectors and ensure the safety of personnel.The development of novel lightweight materials with high electron density has therefore become urgent to alleviate radiation risks.In this work,new MAPbI_(3)/epoxy(CH 3NH 3PbI 3/epoxy)composites were prepared via a crystal plane engineering strategy.These composites delivered excellent radiation shielding performance against 59.5 keV gamma rays.A high linear attenuation coefficient(1.887 cm−1)and mass attenuation coefficient(1.352 cm2 g−1)were achieved for a representative MAPbI_(3)/epoxy composite,which was 10 times higher than that of the epoxy.Theoretical calculations indicate that the electron density of MAPbI_(3)/epoxy composites significantly increases when the content ratio of the(110)plane in MAPbI_(3) increases.As a result,the chances of collision between the incident gamma rays and electrons in the MAPbI_(3)/epoxy composites were enhanced.The present work provides a novel strategy for designing and developing high-efficiency radiation shielding materials.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.52125405 and U22A20108)Thailand Science Research and Innovation Fund Chulalongkorn University,National Research Council of Thailand(NRCT)and Chulalongkorn University(N42A660383).D.D.Zhang would like to thank the financial support from the Scientific Research Fund of Liaoning Provincial Education Department of China(No.JYTQN2023289)+3 种基金Liaoning Provincial Science and Technology Joint Plan(Fund)Project(No.2023-BSBA-259)and the opening project of State Key Laboratory of Metastable Materials Science and Technology,Yanshan University(No.202404).J.Cao would like to acknowledge the support from National Natural Science Foundation of China(Grant No.52402279)China Postdoctoral Science Foundation Special Funding(Grant Nos.2025T180002,2024M751753)the opening project of State Key Laboratory of Metastable Materials Science and Technology(Yanshan University)(No.202401).
文摘Aqueous zinc-ion batteries(AZIBs)offer promising safety and affordability,but suffer from dendritic Zn growth and parasitic side reactions at the electrode-electrolyte interface.Herein,we construct a dual-region interfacial modulation framework by molecularly reconfiguring the Helmholtz double layer via trace methyl methacrylate(MMA).Exploiting its amphiphilic and functionally asymmetric architecture,MMA enables a coordinated interfacial reconstruction that disrupts Zn^(2+)solvation in the outer Helmholtz plane,builds a chemisorbed coordination layer in the inner plane,and modulates local interfacial chemistry with spatial precision.This dualregion regulation collectively suppresses water reactivity,facilitates Zn^(2+)desolvation,and drives crystallo-graphically preferred deposition along the(101)plane,promoting lateral growth and mitigating dendrite for-mation.As a result,symmetric Zn||Zn cells exhibit over 4200 h of stable cycling at 1 mA cm^(-2) and maintain 1100 h of operation at 2 mA cm^(-2),even at 0℃.Zn||Ti half-cells achieve a Coulombic efficiency of 99.83%,while Zn||NH_(4)V_(4)O_(10) full cells deliver 93.92%capacity retention after 400 cycles at 2 A g^(-1),and preserve 85.3%after 300 cycles at 0℃.This work demonstrates a scalable,mechanism-driven electrolyte design paradigm for dendrite-free and high-performance aqueous Zn metal batteries.
基金Financial support provided by the National Natural Science Foundation of China(Grant No.U2067216)NSAF(Grant No.U2130109)is greatly appreciated.
文摘The rapid development of the aerospace and nuclear industries is accompanied by increased exposure to high-energy ionising radiation.Thus,the performance of radiation shielding materials needs to be improved to extend the service life of detectors and ensure the safety of personnel.The development of novel lightweight materials with high electron density has therefore become urgent to alleviate radiation risks.In this work,new MAPbI_(3)/epoxy(CH 3NH 3PbI 3/epoxy)composites were prepared via a crystal plane engineering strategy.These composites delivered excellent radiation shielding performance against 59.5 keV gamma rays.A high linear attenuation coefficient(1.887 cm−1)and mass attenuation coefficient(1.352 cm2 g−1)were achieved for a representative MAPbI_(3)/epoxy composite,which was 10 times higher than that of the epoxy.Theoretical calculations indicate that the electron density of MAPbI_(3)/epoxy composites significantly increases when the content ratio of the(110)plane in MAPbI_(3) increases.As a result,the chances of collision between the incident gamma rays and electrons in the MAPbI_(3)/epoxy composites were enhanced.The present work provides a novel strategy for designing and developing high-efficiency radiation shielding materials.
