Page 24 - Shimadzu Journal vol.10 Issue1

Materials Science

SPM (AFM) Measurements of Cathode

and Anode Materials from All-Solid-State

Lithium-Ion Batteries without Exposure to Air

2
Akinori Kogure , Kenji Yamasaki , Hiroshi Arai , Takeshi Miyamoto , Eiji Iida , and Takenao Fujii 1
1
1
1
2
1 Solutions COE, Analytical & Measuring Instruments Division, Shimadzu Corporation
2 X-Ray/Surface Business Unit, Analytical & Measuring Instruments Division, Shimadzu Corporation
User Benefits
• SPM (AFM) observations and measurements can be performed without SPM-8100FM and Glove Box
exposure to air.
• The cathodes and anodes of all-solid-state lithium-ion batteries can be
observed and measured. These measurements were performed using the SPM-8100FM
• Shapes can be observed at the microscopic scale, and current and high-resolution scanning probe microscope [SPM (AFM)], and a
electrical forces can be visualized. gas flow type glove box (Fig. 1). The features of this equipment
• are as follows.
• SPM
Introduction (1) It can operate in frequency modulation (FM) in addition to am-
plitude modulation (AM).
Further improvements to battery performance are called for due (2) ZXY measurement enables the acquisition of 3-dimensional
to policies promoting electric vehicles (EV). This includes ex- data, including current and electric forces (hereafter: ZXY data).
pectations for the commercialization of all-solid-state lithium-ion Glove Box
batteries because of their advantages including safety, high energy (1) Oxygen and water vapor concentrations are both 1 ppm or less.
density, and resistance to degradation. One issue in the practical
utilization of such batteries is the difficulty of reducing the inter-
face resistance between the electrodes and the solid electrolyte.
However, it is believed that shape observations and measurements
of current at the microscopic scale will lead to a better understand-
ing of interface reaction mechanisms leading to the resolution of
this issue. This article introduces examples of surface observations
of cathode and anode materials and measurements of current in
all-solid-state lithium-ion batteries using SPM.

(a) SPM-8100FM (b) Gas Flow Type Glove Box
Fig. 1. SPM-8100FM and Glove Box

Shimadzu Journal vol.10 Issue1 23