The effective optimization of Zn anode/protective layer interface stability,underpinned by an in-depth exploration of durable protection mechanisms,is crucial for developing artificial protective layers in high-perfor...The effective optimization of Zn anode/protective layer interface stability,underpinned by an in-depth exploration of durable protection mechanisms,is crucial for developing artificial protective layers in high-performance aqueous Zn-ion batteries(AZIBs).In this work,we present a self-regulating,continuous and dense amorphous Al_(2)O_(3-x)-2 layer(referred to as A-Al_(2)O_(3-x)-2 layer)with exceptional mechanical strength,achieved through core process control.Spectroscopic and theoretical studies reveal that the amorphous structure of Al_(2)O_(3-x)-2,featuring stable oxygen vacancies,significantly enhances Zn^(2+)transfer kinetics and promotes uniform distribution.This unique structure guides controlled Zn deposition along the(002)plane,facilitating stable cycling.Furthermore,the excellent mechanical strength of A-Al_(2)O_(3-x)-2@Zn is well maintained under extended cycling conditions,ensuring lasting interface integrity and durable protection.Under a challenging current density of 60 mA cm^(-2),the A-Al_(2)O_(3-x)-2@Zn symmetric cell demonstrates an impressive cycling lifespan of 9620 cycles.Furthermore,a full cell assembled with an A-Al_(2)O_(3-x)-2@Zn anode and an Al^(3+)-doped MnO_(2)cathode exhibits substantially improved cycling performance with 100% capacity retention after 900 cycles at 1 A g^(-1),underscoring the importance of the synergistic effects between anode and cathode materials in achieving long-life AZIBs,This work provides valuable insights into designing durable protective layers for Zn anodes in aqueous Zn-ion batteries.展开更多
基金financially supported by the National Natural Science Foundation of China(42377487,42307582)the Guangdong Basic and Applied Basic Research Foundation(2022A1515110477,2022B1515120019)Support Project of Guangzhou Association for Science and Technology(QT2024-07)。
文摘The effective optimization of Zn anode/protective layer interface stability,underpinned by an in-depth exploration of durable protection mechanisms,is crucial for developing artificial protective layers in high-performance aqueous Zn-ion batteries(AZIBs).In this work,we present a self-regulating,continuous and dense amorphous Al_(2)O_(3-x)-2 layer(referred to as A-Al_(2)O_(3-x)-2 layer)with exceptional mechanical strength,achieved through core process control.Spectroscopic and theoretical studies reveal that the amorphous structure of Al_(2)O_(3-x)-2,featuring stable oxygen vacancies,significantly enhances Zn^(2+)transfer kinetics and promotes uniform distribution.This unique structure guides controlled Zn deposition along the(002)plane,facilitating stable cycling.Furthermore,the excellent mechanical strength of A-Al_(2)O_(3-x)-2@Zn is well maintained under extended cycling conditions,ensuring lasting interface integrity and durable protection.Under a challenging current density of 60 mA cm^(-2),the A-Al_(2)O_(3-x)-2@Zn symmetric cell demonstrates an impressive cycling lifespan of 9620 cycles.Furthermore,a full cell assembled with an A-Al_(2)O_(3-x)-2@Zn anode and an Al^(3+)-doped MnO_(2)cathode exhibits substantially improved cycling performance with 100% capacity retention after 900 cycles at 1 A g^(-1),underscoring the importance of the synergistic effects between anode and cathode materials in achieving long-life AZIBs,This work provides valuable insights into designing durable protective layers for Zn anodes in aqueous Zn-ion batteries.
