idw – Informationsdienst Wissenschaft
Nachrichten, Termine, Experten
Nachrichten, Termine, Experten
3. The memory effect according to the “Many Particles Model”. The chemical potential of the particles rises steadily at first, as the particles give off lithium ions (Fig. b). Once at Point B (chemical potential barrier), the particles quickly give off the remaining lithium ions (Fig. c). The particles overcome the barrier one after the other rather than simultaneously. After partial charging, some particles return to the front of the barrier (Fig. d). They then “slide down the slope”, so that thermodynamic equilibrium is restored. Now, a division of particles into lithium-rich and lithium-poor is established. This separation persists, even after the battery has been completely discharged (Fig. e and f). During the next charging cycle, this group of lithium-poor particles will cross the barrier first while additional work is needed to take the “delayed” group of lithium-poor particles across the barrier. This implies an overvoltage, the hallmark of a memory effect.
Picture: Nature
(244 KB, 1024 x 1126 pixels)
In regard to the use of pictorial material: use of such material in this press release is remuneration-free, provided the source is named. The material may be used only in connection with the contents of this press release. For pictures of higher resolution or inquiries for any further use, please contact the Press office publishing this directly.
A few months ago, idw launched its account on Instagram. Here we post news from idw, which events [...]
We have set up a new channel where all press releases of our members on research results, research [...]
You can combine search terms with and, or and/or not, e.g. Philo not logy.
You can use brackets to separate combinations from each other, e.g. (Philo not logy) or (Psycho and logy).
Coherent groups of words will be located as complete phrases if you put them into quotation marks, e.g. “Federal Republic of Germany”.
You can also use the advanced search without entering search terms. It will then follow the criteria you have selected (e.g. country or subject area).
If you have not selected any criteria in a given category, the entire category will be searched (e.g. all subject areas or all countries).
