Announcement of Writing a Book on Lithium-Ion Secondary Batteries

From the production of battery cells to charge and discharge cycle testing, disassembly, and investigation of degradation components.

When investigating the degradation mechanisms of secondary batteries, it is important to analyze the deposits on the electrode surface. At MST, we conduct TOF-SIMS measurements under controlled atmospheric conditions, allowing us to evaluate the chemical state of the electrode's outermost surface without alteration due to exposure to the atmosphere. Additionally, by consistently performing measurements from charge-discharge cycle tests to the electrode surface, we can examine the correlation between the state of charge-discharge and the condition of the deposits on the electrode surface.

• Contract Analysis
• Contract measurement

Consistent evaluation from battery cell manufacturing, degradation testing, disassembly, to investigation of state changes due to degradation.

A degradation test was conducted on a battery cell made with LiCoO2 as the positive electrode, graphite as the negative electrode, and LiPF6/EC:DEC as the electrolyte, which was left in a constant temperature chamber at 60°C in a charged state of 4.2V for about one week. After that, the cell was disassembled and cleaned in an Ar atmosphere, and TOF-SIMS analysis of the negative electrode graphite was performed. Before the test, fragments derived from the binder and electrolyte salt were confirmed, and after the test, fragments such as Li3PO4 and PF3O, which are believed to have been generated due to the degradation of the electrolyte salt, as well as fragments from Li2CO3, were observed. Additionally, the detection of Co suggests the possibility of leaching of the positive electrode active material.

• Contract Analysis
• Contract measurement

We will dismantle and analyze regardless of the experimental cell.

This is an example of evaluating the organic solvent components of an electrolyte using GC/MS analysis. The measurement of the electrolyte in lithium-ion secondary batteries revealed that the main components of the organic solvents are ethylene carbonate (EC) and propylene carbonate (PC). Other components detected included diethyl carbonate (DEC) and sulfur compounds, with the latter possibly originating from additives.

• Contract measurement

The "Mechanical Stitch Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact to the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact on the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Features: ● Equipped with Intel Core Ultra 7 255H/7 155H/5 225H/5 125H ● LPDDR5x 16GB/32GB/64GB onboard ● M.2 NVMe 256GB onboard ● USB 2.0 x 8, USB 3.2 (10Gbps) x 4 ● PCIe Gen 4 [x8] x 1, PCIe Gen 3 [x1] x 4, PCIe Gen 3 [x4] x 1 (2 lanes co-lay with SATA; BOM option) ● 2.5GbE x 2 ● COM-HPC Mini standard, size 95mm x 70mm ● Optional items ECB-980A: Development carrier board HPC-ARHm-FAN01: CPU fan HPC-ARHm-HSP01: Heat spreader (Note: heat dissipation is required in the enclosure)

Features: ● Equipped with Jetson AGX Orin 32GB/64GB ● Gigabit LAN ×1, 10Gigabit LAN ×1 ● USB 3.2 Gen 2 (Type-A) ×4 ● DB-9 connector ×1 (for DIO 8 channels) ● DB-9 connector ×2 (supports RS-232/422/485: Rx/Tx/RTS/CTS) ● Jetpack 6.0.0 pre-installed

Features: ● Equipped with Intel Atom x7835RE/x7433RE ● LPDDR5x 8GB/16GB onboard ● eMMC 32GB/64GB onboard ● LVDS x 1, DDI x 1 ● USB 2.0 x 8, USB 3.2 Gen 2 x 2 ● PCIe x1 x 4 ● COMe Type 10 standard, 84mm x 55mm size ● Operating temperature -40 to 85℃ ● Optional items ECB-920A-0001: Development carrier board NANOCOM-ADN-FAN01: CPU fan NANOCOM-ADN-HSP01: Heat spreader (※ Heat dissipation is required in the enclosure)