DataVXAdvanced MaterialsPaper
journal article·2023-07Open access

Hydroiodic‐Acid‐Initiated Dense yet Porous Ti3C2Tx MXene Monoliths toward Superhigh Areal Energy Storage

Zhitan Wu, Yaqian Deng, Jinyang Yu, Junwei Han, Tongxin Shang, Derong Chen, Ning Wang, Sichen Gu, Wei Lv, Feiyu Kang, Ying Tao, Quan‐Hong Yang

Advanced Materials· Volume 35· Issue 29
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Source abstract

Abstract

Abstract The assembly of 3D structured materials from 2D units paves a royal road for building thick and dense electrodes, which are long sought after for practical energy‐storage devices. 2D transitional metal carbides (MXene) are promising for this due to their capabilities of solution‐based assembly and intrinsic high density, yet face huge challenges in yielding high areal capacitance electrodes owing to the absence of porous ion‐transport paths. Here, a gelation–densification process initiated by hydroiodide acids (HI) is proposed, where the protons break the electrostatic balance of MXene nanosheets to trigger gelation, while HI serves as a spacer to prevent nanosheets from restacking during capillary shrinkage. More promising, the controlled evaporation of reductive HI leaves superiorly shrinking yet porous network for ion transport, and the produced monoliths exhibit a high density of 2.74 g cm−3 and an unprecedented areal capacitance of 18.6 F cm−2.
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Research context

Nanomaterials

OpenAlex topics: MXene and MAX Phase Materials · Supercapacitor Materials and Fabrication · Advanced Memory and Neural Computing

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology National Industry‐Education Integration Platform of Energy Storage and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China

Shenzhen Key Laboratory for Graphene‐based Materials Engineering Laboratory for Functionalized Carbon Materials Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China

Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192 China

Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 China

Funding

National Natural Science Foundation of China

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