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Superionic lithium transport via multiple coordination environments defined by two-anion packing

DOI: 10.1126/science.adh5115 DOI Help

Authors: Guopeng Han (University of Liverpool) , Andrij Vasylenko (University of Liverpool) , Luke M. Daniels (University of Liverpool) , Chris M. Collins (University of Liverpool) , Lucia Corti (University of Liverpool) , Ruiyong Chen (University of Liverpool) , Hongjun Niu (University of Liverpool) , Troy D. Manning (University of Liverpool) , Dmytro Antypov (University of Liverpool) , Matthew S. Dyer (University of Liverpool) , Jungwoo Lim (University of Liverpool) , Marco Zanella (University of Liverpool) , Manel Sonni (University of Liverpool) , Mounib Bahri (University of Liverpool) , Hongil Jo (University of Liverpool) , Yun Dang (University of Liverpool) , Craig M. Robertson (University of Liverpool) , Frédéric Blanc (University of Liverpool) , Laurence J. Hardwick (University of Liverpool) , Nigel D. Browning (University of Liverpool) , John B. Claridge (University of Liverpool) , Matthew J. Rosseinsky (University of Liverpool)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Science , VOL 383 , PAGES 739 - 745

State: Published (Approved)
Published: February 2024
Diamond Proposal Number(s): 30461 , 31578

Abstract: Fast cation transport in solids underpins energy storage. Materials design has focused on structures that can define transport pathways with minimal cation coordination change, restricting attention to a small part of chemical space. Motivated by the greater structural diversity of binary intermetallics than that of the metallic elements, we used two anions to build a pathway for three-dimensional superionic lithium ion conductivity that exploits multiple cation coordination environments. Li7Si2S7I is a pure lithium ion conductor created by an ordering of sulphide and iodide that combines elements of hexagonal and cubic close-packing analogously to the structure of NiZr. The resulting diverse network of lithium positions with distinct geometries and anion coordination chemistries affords low barriers to transport, opening a large structural space for high cation conductivity.

Diamond Keywords: Batteries; Lithium-ion

Subject Areas: Materials, Chemistry, Energy

Instruments: I11-High Resolution Powder Diffraction , I19-Small Molecule Single Crystal Diffraction

Added On: 21/02/2024 14:22

Discipline Tags:

Energy Storage Energy Physical Chemistry Energy Materials Chemistry Materials Science

Technical Tags:

Diffraction Single Crystal X-ray Diffraction (SXRD) X-ray Powder Diffraction