Magnetic Structure and Properties of the Na2CoP2O7 Pyrophosphate Cathode for Sodium-Ion Batteries: A Supersuperexchange-Driven Non-Collinear Antiferromagnet | Zendy

Prabeer Barpanda | Zendy; Maxim Avdeev | Zendy; Chris D. Ling | Zendy; Jiechen Lu | Zendy; Atsuo Yamada | Zendy

Open Access

Magnetic Structure and Properties of the Na₂CoP₂O₇ Pyrophosphate Cathode for Sodium-Ion Batteries: A Supersuperexchange-Driven Non-Collinear Antiferromagnet

Author(s) -

Prabeer Barpanda,

Maxim Avdeev,

Chris D. Ling,

Jiechen Lu,

Atsuo Yamada

Publication year - 2012

Publication title -

inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 233

eISSN - 1520-510X

pISSN - 0020-1669

DOI - 10.1021/ic302191d

Subject(s) - chemistry , pyrophosphate , antiferromagnetism , ion , cathode , sodium , inorganic chemistry , crystallography , condensed matter physics , physics , organic chemistry , enzyme , biochemistry

The crystal and magnetic structure and properties of the Na(2)CoP(2)O(7) Na(+)-ion battery cathode material have been characterized by magnetic susceptibility, specific heat, and variable-temperature neutron powder diffraction measurements. Na(2)CoP(2)O(7) crystallizes in the orthorhombic space group Pna2(1) with a = 15.4061(3) Å, b = 10.28854(9) Å, and c = 7.70316(15) Å, having a layered structure with slabs of [CoP(2)O(7)](∞) separated by Na cations. The magnetic property measurements and neutron diffraction data analysis reveal that the material undergoes long-range ordering to a noncollinear antiferromagnetic G-type structure below T(N) ≈ 6.5 K. The magnetic structure is rationalized as a result of supersuperexchange between Co(2+) atoms linked by phosphate groups.

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