Sodium Diffusion in Hard Carbon Studied by Small-and Wide-Angle Neutron Scattering and Muon Spin Relaxation

被引：0

作者：

Ohishi, Kazuki ^{[1
]}

Igarashi, Daisuke ^{[2
]}

Tatara, Ryoichi ^{[2
]}

Kawamura, Yukihiko ^{[1
]}

Hiroi, Kosuke ^{[3
]}

Suzuki, Jun-ichi ^{[1
]}

Umegaki, Izumi ^{[4
]}

Nishimura, Shoichiro ^{[4
]}

Koda, Akihiro ^{[4
]}

Komaba, Shinichi ^{[2
]}

Sugiyama, Jun ^{[1
]}

机构：

[1] Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Ibaraki 3191106, Japan

[2] Tokyo Univ Sci, Dept Appl Chem, Shinjuku Ku, Tokyo 1620826, Japan

[3] Japan Atom Energy Agcy JAEA, J PARC Ctr, Ibaraki 3191195, Japan

[4] High Energy Accelerator Res Org KEK, Inst Mat Struct Sci, Muon Sci Lab, Tokai, Ibaraki 3191106, Japan

来源：

15TH INTERNATIONAL CONFERENCE ON MUON SPIN ROTATION, RELAXATION AND RESONANCE | 2023年 / 2462卷

关键词：

D O I：

10.1088/1742-6596/2462/1/012048

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Hard carbon is the most common anode material for Na-ion battery. The structure of the hard carbon and the dynamics of Na-ion in hard carbon were studied with small- and wideangle neutron scattering and muon spin relaxation technique. The neutron scattering revealed the increase of interlayer distance between graphenes and decrease of the size of nanopores with increasing sodium intercalation in hard carbon. The muon spin relaxation revealed that a systematic increase in the field fluctuation rate with increasing temperature evidenced a thermally activated sodium diffusion. Assuming the two-dimensional diffusion of Na-ion in the graphene layers, the self-diffusion coefficient of Na-ion was estimated to be 2.6 x 10(-11) cm(2)/s at 310 K, with a thermal activation energy of 39(7) meV.

引用

页数：5

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