EV Engineering News

Toyota scientists observe lithium ions in their native electrolyte


Toyota has developed a new method for observing the behavior of lithium ions in an electrolyte during battery charging and discharging, making it possible to observe in real time the deviation of ions, which is one of the causes of deterioration in the performance of Li-ion batteries.

It is already known that lithium ion deviation occurs both in electrodes and electrolyte as a result of charging and discharging, and such deviation is believed to reduce the area in which the maximum performance of a battery can be achieved. However, confirming the behavior of ions in the electrolyte under actual use conditions was not possible using previous methods.

Toyota scientists used an apparatus called Beamline2, which generates X-rays a billion times more powerful than those of a medical X-ray machine. This makes it possible to create video images with a resolution of 0.65 micron/pixel and 100 ms/frame. The researchers replaced the usual phosphorous in the electrolyte with heavy elements, which transmit less of the X-rays, yielding a sharper image. By observing the behavior of the heavy elements, the researchers were able to observe the deviation behavior of the lithium ions which are bound to them in the electrolyte.

Toyota now plans to observe the behavior of ions in batteries with different cathodes, anodes, separators, and electrolytes, as well as differences in battery control. Analyzing the mechanisms that cause deterioration of battery performance should lead to insights that can improve battery life and vehicle range.

toyota-li-ion-observation-method-2Condition While Discharging
toyota-li-ion-observation-method-3Newly-Developed Observation Method
Li-ion Deviation in Electrolyte During Battery Discharge


Source: Toyota

Create Account. Already Registered? Log In

Virtual Conference on EV Infrastructure: Free to Attend

Don't miss our next Virtual Conference on December 4-6, 2023. Register for the free webinar sessions below and reserve your spot to watch them live or on-demand.


EV Engineering Webinars & Whitepapers

EV Tech Explained

The Tech

How to protect an EV’s on-board charger from transient grid surges

Will designating China as an “entity of concern” spur the development of US supply chains?

White House clarifies (sort of) EV tax credit eligibility rules for foreign companies

Researchers develop cobalt-free lithium-ion battery

The Vehicles & Infrastructure

FTC seeks public comment on its labeling requirements for public EV chargers

2 days left to join the Virtual Conference on EV Infrastructure

Swiss firm Designwerk presents container-sized Mega Charger for commercial EVs

Updated OpenADR communications standard helps utilities manage renewables and EV charging

Rivian launches leasing for R1T electric pickup truck in 14 states

EPRI’s new groundbreaking grid planning tool for electric transportation (Webinar)

Circontrol’s next-generation Raption EV chargers feature 240 kW of power, new user-friendly features

Rental companies account for a third of fossil cars sold in Norway

U.S. Steel pilots battery-electric locomotives

TeraWatt Infrastructure breaks ground on heavy-duty EV charging site near Port of Long Beach