Scientists develop functional micro-arrays for efficient lithium metal anode interface

Scientists develop functional micro-arrays for efficient lithium metal anode interface

Scientists develop functional micro-arrays for efficient lithium metal anode interface
Interaction of nano-hydroxyapatite with lithium ions and effect on the formation of solid electrolyte interface. Credit: IMR

Lithium (Li) metal anodes, with the highest specific capacity (3,860 mAh g-1) and the lowest redox potential (-3.04 V vs. standard hydrogen electrode), are considered a potential alternative for the next generation high-energy-density lithium batteries. However, the unstable electrolyte–Li metal anode interface has been the biggest obstacle for the practical application of Li metal anode batteries.

Researchers led by Prof. Bai Shuo and Prof. Li Feng from the Institute of Metal Research (IMR) of the Chinese Academy of Sciences (CAS), together with Prof. Tan Jun from Ji Hua Laboratory, have achieved the spatially selective distribution of the targeted solvation structure of ions at the electrolyteanode interface by fabricating micro-arrays of nano-hydroxyapatite (nHA) with high Li+ binding energy on copper (Cu) foil.

Their work was published in Advanced Materials.

According to the researchers, the key to a stable Li metal anode is to construct a robust solid electrolyte interface (SEI) film at the electrolyte–anode interface. The most ideal approach is to optimize the solvated structure of the ions in the electrolyte, especially at the electrolyte–anode interface, while maintaining the properties of the bulk electrolyte.

They found that the electronegative nHA particles with high Li+ binding energy can effectively tune the solvation structure of ions in the electrolyte. Li+ will preferentially migrate to the surface of the nHA particle, forming a local Li+-rich region around the nHA particle, where anions can interact with more Li+ to form multi-coordinated anions.

Based on this finding, micro-arrays of nHA are further prepared on Cu foil (current collector of the anode) to preferentially form multi-coordinated anions at the electrolyte–anode interface. Meanwhile, the experiment also verifies that the micro-arrays do not affect the solvation structure of the bulk electrolyte.

In general, uncoordinated anions are strongly repelled by the electron-rich anode, which greatly reduces the decomposition efficiency of the anions. In this study, using nHA micro-arrays, the multi-coordinated anions at the electrolyte–anode interface can be carried by Li+ to effectively cross the electric double layer on the anode, which is desired for an anion-derived SEI film. The anions in the electrolyte are more completely decomposed into highly protective inorganic components in the SEI film, which can effectively suppress the dendrite growth on the anode.

As a result, at high charge-discharge current densities, the risk of the notorious micro-short circuit happening in Li-metal batteries is significantly reduced.

The finding of electronegative materials tuning local solvation structure in the electrolyte provides new design principles for building robust SEI for stable Li-metal batteries.

More information:
Haorui Shen et al, Spatially Selective Solvation Structure by Electronegative Micro‐Arrays for Stable Lithium‐Metal Anode Interface, Advanced Materials (2023). DOI: 10.1002/adma.202306553

Scientists develop functional micro-arrays for efficient lithium metal anode interface (2023, December 6)
retrieved 6 December 2023

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

Disasters Expo USA, is proud to be supported by Inergency for their next upcoming edition on March 6th & 7th 2024!

The leading event mitigating the world’s most costly disasters is returning to the Miami Beach

Convention Center and we want you to join us at the industry’s central platform for emergency management professionals.
Disasters Expo USA is proud to provide a central platform for the industry to connect and
engage with the industry’s leading professionals to better prepare, protect, prevent, respond
and recover from the disasters of today.
Hosting a dedicated platform for the convergence of disaster risk reduction, the keynote line up for Disasters Expo USA 2024 will provide an insight into successful case studies and
programs to accurately prepare for disasters. Featuring sessions from the likes of The Federal Emergency Management Agency,
NASA, The National Aeronautics and Space Administration, NOAA, The National Oceanic and Atmospheric Administration, TSA and several more this event is certainly providing you with the knowledge
required to prepare, respond and recover to disasters.
With over 50 hours worth of unmissable content, exciting new features such as their Disaster
Resilience Roundtable, Emergency Response Live, an Immersive Hurricane Simulation and
much more over just two days, you are guaranteed to gain an all-encompassing insight into
the industry to tackle the challenges of disasters.
By uniting global disaster risk management experts, well experienced emergency
responders and the leading innovators from the world, the event is the hub of the solutions
that provide attendees with tools that they can use to protect the communities and mitigate
the damage from disasters.
Tickets for the event are $119, but we have been given the promo code: HUGI100 that will
enable you to attend the event for FREE!

So don’t miss out and register today:

And in case you missed it, here is our ultimate road trip playlist is the perfect mix of podcasts, and hidden gems that will keep you energized for the entire journey


This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More