Page 20 - Guide to Lithium-ion Battery Solutions

Organic / Inorganic Component Analysis

Component analysis of internally generated gas and deterioration evaluation due to charging and discharging Purpose Samples

Confirmation of changes in gas composition Internal gas obtained from four batteries
due to deterioration with different capacity retention rates
Gas Chromatograph

Nexis GC-2030
™
• BID (Barrier-discharge Ionization Detector) is more sensitive than
TCD, and can deal with objects that cannot be detected by FID Data
• Detect inorganic gases and hydrocarbons simultaneously
• Qualitative analysis when combined with GCMS

It is necessary to analyze the internally generated gas when conducting a deterioration evaluation of a Lithium-ion
Battery. We will introduce an example of simultaneous analysis of internal gas using a system equipped with the unique
BID detector. It eliminates the need for carrier gas switching and the combined use of multiple devices, which was
required in the past, and enables easier and faster measurement.

Purpose Samples

Simultaneous analysis of internal gas Internal gas

Data

Changes in the composition of internal gas due to deterioration
Component Concentration
Ratio (%)

Result

As the capacity retention rate decreases, the ratio of hydrogen decreases and the ratio of hydrocarbon increases.

Simultaneous analysis of internal gas

Result

The GC-BID enables simultaneous analysis of inorganic gas components (H 2 , O 2 , N 2 , CO, CO 2 ) and lower hydrocarbon
components (CH 4 , C 2 H 4 , C 2 H 6 , C 3 H 6 , C 3 H 8 ) in the battery.

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