Scientists at Tokyo Tech have addressed one of the major disadvantages of all-solid-state batteries by developing batteries with a low resistance at their electrode/solid electrolyte interface. The fabricated batteries showed excellent electrochemical properties that greatly surpass those of traditional and ubiquitous Li-ion batteries; thereby, demonstrating the promise of all-solid-state battery technology and its potential to revolutionize portable electronics.
Many consumers are familiar with rechargeable lithium ion batteries, which have developed over the last few decades, and are now common in all sorts of electronic devices. Despite their broad use, scientists and engineers believe that traditional Li-ion battery technology is already nearing its full potential and new types of batteries are needed.
All-solid-state batteries are new type of Li-ion battery, and have been shown to be potentially safer and more stable energy-storing devices with higher energy densities. However, the use of such batteries is limited due to a major disadvantage: their resistance at the electrode/solid electrolyte interface is too high, hindering fast charging and discharging.
Scientists from Tokyo Tech and Tohoku University, led by Professor Taro Hitosugi, fabricated all-solid-state batteries with extremely low interface resistance using Li(Ni0.5Mn1.5)O4 (LNMO), by fabricating and measuring their batteries under ultrahigh vacuum conditions, ensuring that the electrolyte/electrode interfaces were free of impurities.
The structure of these all-solid-state batteries is shown in Figure 1. After fabrication, the electrochemical properties of these batteries were characterized to shed light on Li-ion distribution around the interface. X-ray diffraction and Raman spectroscopy were used for analyzing the crystal structure of the thin films comprising the batteries. Spontaneous migration of Li ions was found to occur from the Li3PO4 layer to the LNMO layer, converting half the LNMO to L2NMO at the Li3PO4/LNMO interface. The reverse migration occurs during the initial charging process to regenerate LNMO.
The resistance of this interface, verified using electrochemical impedance spectroscopy, was 7.6 ?cm2, two orders of magnitude smaller than that of previous LMNO-based all-solid-state batteries and even smaller than that of liquid-electrolyte-based Li-ion batteries using LNMO. These batteries also displayed fast charging and discharging, managing to charge/discharge half the battery within just one second. Moreover, the cyclability of the battery was also excellent, showing no degradation in performance even after 100 charge/discharge cycles (see Figure 2).
Li(Ni0.5Mn1.5)O4 is a promising material to increase the energy density of a battery, because the material provides us of a higher voltage. The research team hopes that these results will facilitate the development of high-performance all-solid-state batteries, which could revolutionize modern portable electronic devices and electric cars.
The Latest on: All-solid-state batteries
via Google News
The Latest on: All-solid-state batteries
While the Solid State Battery is Five Years out, when it arrives it'll Rock the Automotive, Wearable & Portable Device Markets
on August 15, 2018 at 9:16 am
At the moment, the technology has been proven to last 2X longer than any other battery product." On Monday a new report published by Materials Today covered new advancements in all-solid-state batteri... […]
Should Tesla Be Worried about the IMF’s Lithium and Cobalt Supply Warning?
on August 14, 2018 at 8:47 am
As for solid state EV batteries, even though some Japanese automakers are betting big on the technology, Nissan’s Takao Asami has his doubts. This is what he told Automotive News earlier this year: “A... […]
The best solution for making batteries safer might be the most boring one
on August 13, 2018 at 6:00 am
(For example, automotive designer Henrik Fisker recently made this same claim.) But McClenny thinks almost all solid-state batteries are pretty far from commercialization. “I don’t think solid-state i... […]
Expanding the limits of Li-ion batteries—electrodes for all-solid-state batteries
on August 7, 2018 at 4:55 am
Scientists at Tokyo Institute of Technology have addressed one of the major disadvantages of all-solid-state batteries by developing batteries with a low resistance at their electrode/solid electrolyt... […]
Expanding the limits of Li-ion batteries
on August 7, 2018 at 2:29 am
Figure 1. Structure of the thin-film all-solid-state batteries. The batteries were made by stacking various layers via thin-film deposition methods. The LNMO/Li3PO4 interface showed spontaneous migrat... […]
A New Material That Could Create Super Batteries
on August 6, 2018 at 3:00 pm
Batteries have three key components in their simplest form ... in minutes have implications for high-power applications, fast-charging devices, all-solid-state energy storage systems, electrode design ... […]
Expanding the limits of Li-ion batteries: Electrodes for all-solid-state batteries
on August 6, 2018 at 9:13 am
Scientists have addressed one of the major disadvantages of all-solid-state batteries by developing batteries with a low resistance at their electrode/solid electrolyte interface. The fabricated batte... […]
Bracing for EV shift, NGK Spark Plug ignites all solid-state battery quest
on July 5, 2018 at 4:51 am
Facing the eventual demise of gasoline engines, the world’s biggest maker of spark plugs is turning its focus to a component it believes will be just as vital in the coming era of electric vehicles – ... […]
Panasonic flags battery cell shortages as Tesla Model 3 output picks up
on June 28, 2018 at 12:20 am
To reduce the risk of over-relying on Tesla, Panasonic has teamed up with Toyota Motor Corp to jointly develop batteries for electric vehicles. At the shareholders meeting, Panasonic Chief Executive K... […]
via Bing News