Discovery of Anion Insertion Electrochemistry in Layered Hydroxide Nanomaterials

Scientific Reports
Matthias J YoungCarlo U Segre

Abstract

Electrode materials which undergo anion insertion are a void in the materials innovation landscape and a missing link to energy efficient electrochemical desalination. In recent years layered hydroxides (LHs) have been studied for a range of electrochemical applications, but to date have not been considered as electrode materials for anion insertion electrochemistry. Here, we show reversible anion insertion in a LH for the first time using Co and Co-V layer hydroxides. By pairing in situ synchrotron and quartz crystal microbalance measurements with a computational unified electrochemical band-diagram description, we reveal a previously undescribed anion-insertion mechanism occurring in Co and Co-V LHs. This proof of concept study demonstrates reversible electrochemical anion insertion in LHs without significant material optimization. These results coupled with our foundational understanding of anion insertion electrochemistry establishes LHs as a materials platform for anion insertion electrochemistry with the potential for future application to electrochemical desalination.

References

Oct 6, 2005·Journal of the American Chemical Society·Zhaoping LiuTakayoshi Sasaki
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Jun 16, 2010·Chemical Communications : Chem Comm·Xiaoxiao GuoXue Duan
Dec 17, 2010·Environment International·Julia FabregaJamie R Lead
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Jul 1, 2017·Journal of Synchrotron Radiation·Matthias J YoungLiming Dai
Apr 26, 2017·ACS Omega·Jaehan LeeJeyong Yoon

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Citations

May 7, 2021·Nature·J Tyler MeffordWilliam C Chueh

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Methods Mentioned

BETA
quartz
X-ray
transmission electron microscopy
quartz crystal microbalance
delamination
infrared spectroscopy

Software Mentioned

EQCM

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