Constructing two-dimensional(2D)structures for transition-metal oxides(TMOs)can optimize their electronic structures and enable high specific surface areas,thereby offering routes to enhancing the performance of TMOs ...Constructing two-dimensional(2D)structures for transition-metal oxides(TMOs)can optimize their electronic structures and enable high specific surface areas,thereby offering routes to enhancing the performance of TMOs in energy storage and conversion.However,most 2D TMOs,e.g.,Fe_(2)O^(3),remain so far synthetically challenging due to their intrinsic non-layered structures.Herein,inspired by the mechanism of biomineralization,we report the synthesis of CuO/Fe_(2)O^(3)hybrid ultrathin nanosheets by using polyvinylpyrrolidone-decorated CuO nanosheets as growth modifiers to modulate the hydrolysis process of Fe^(2+).The formulated“absorption-and-crystallization”two-step formation processes of such 2D hybrid structures accorded well with the biomineralization scheme in nature.Combining the in-situ transmission electron microscopy(TEM)study,theoretical calculation,and control experiments,we validated that the large density of 2D/2D interfaces enabled by this bio-inspired synthesis process can overcome the self-stacking phenomenon during lithium-ion battery cycling,leading to their high operation stability.This work emphasizes the bio-inspired synthesis of 2D TMOs as a promising pathway toward material design and performance optimization.展开更多
基金supported by the National Natural Science Foundation of China(Nos.U1932213,51732011,81788101,11227901,and 21805192)the National key Research and Development Program of China(No.2021YFA0715700)+7 种基金the National Basic Research Program of China(No.2021YFA0715700)the National Key Research and Development Program of China(No.2018YFE0202201)Science and Technology Major Project of Anhui Province(No.201903a05020003)the Fundamental Research Funds for the Central Universities(No.WK2060000031)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB22040502)Guangdong Basic and Applied Basic Research Foundation(No.2019A1515110735)China Postdoctoral Science Foundation(No.2020M671612)Jiangsu Postdoctoral Science Foundation(No.2020Z082)。
文摘Constructing two-dimensional(2D)structures for transition-metal oxides(TMOs)can optimize their electronic structures and enable high specific surface areas,thereby offering routes to enhancing the performance of TMOs in energy storage and conversion.However,most 2D TMOs,e.g.,Fe_(2)O^(3),remain so far synthetically challenging due to their intrinsic non-layered structures.Herein,inspired by the mechanism of biomineralization,we report the synthesis of CuO/Fe_(2)O^(3)hybrid ultrathin nanosheets by using polyvinylpyrrolidone-decorated CuO nanosheets as growth modifiers to modulate the hydrolysis process of Fe^(2+).The formulated“absorption-and-crystallization”two-step formation processes of such 2D hybrid structures accorded well with the biomineralization scheme in nature.Combining the in-situ transmission electron microscopy(TEM)study,theoretical calculation,and control experiments,we validated that the large density of 2D/2D interfaces enabled by this bio-inspired synthesis process can overcome the self-stacking phenomenon during lithium-ion battery cycling,leading to their high operation stability.This work emphasizes the bio-inspired synthesis of 2D TMOs as a promising pathway toward material design and performance optimization.
