Argonne National Laboratory

Science Highlights

Date Postedsort ascending
Illustration of CEES’ vision for a high-capacity “all-in-one” Li-ion/Li-O2 cell.
CEES introduces a new vision for high-capacity hybrid Li-ion/Li-O2 batteries

Researchers at the Center for Electrochemical Energy Science (CEES) at Argonne National Laboratory have presented a vision for designing hybrid Li-ion/Li-O2 cells that would provide an energy density significantly higher than that of conventional Li-ion cells, without the need for external oxygen.

September 30, 2013
A polymerizable additive for passivating high-voltage cathodes

High-voltage cathode materials are being developed for lithium ion (Li-ion) batteries with the goal of significantly increasing battery energy density. Conventional Li-ion battery electrolyte systems are quite unstable at these high potentials, leading to short calendar and cycle lives, as well as potential safety issues. In this research project, we are studying the use of organic monomers as electrolyte additives that will oxidize and polymerize to form stable passivation films on the surface of high voltage cathode materials.

December 7, 2012
Improving and observing lithiation reactions

In a quest to understand and improve the behavior of lithium-ion (Li-ion) batteries, CEES researchers are exploring the potential to develop new enabling materials with improved lithiation capacity and to observe these reactions in real-time as these reactions proceed.

September 21, 2012
In situ study of solid electrolyte interphase (SEI) formation

The solid electrolyte interphase (SEI), which forms spontaneously at the electrode-electrolyte interface, plays a critical role in the performance and safety of Li-ion batteries, but little is known about its structure from in-situ observations. This research used a model system, epitaxial graphene on SiC, to provide a well-defined surface that is similar to graphite, the most commonly used anode in Li-ion batteries.

July 27, 2012
Autonomic shutdown of Lithium-ion batteries using thermoresponsive microcapsules

To enhance the safety of Li-ion batteries, researchers at the Center for Electrochemical Energy Science, a U.S. Department of Energy Energy Frontier Research Center, have developed a novel technique to terminate cell operation during an overheating event, while minimizing the risk for electrode shorting.

March 19, 2012
Nanoscale in situ characterization of Li-ion battery electrochemistry via scanning ion microscopy

To enhance the performance and lifetime of lithium-ion (Li-ion) batteries, researchers require an improved understanding of the formation of the solid-electrolyte interphase (SEI) layer and the degradation mechanisms in battery electrodes at the nanometer scale. Researchers at the Center for Electrochemical Energy Science (CEES), a U.S. Department of Energy (DOE) Energy Frontier Research Center (EFRC), have developed a novel in situ technique using scanning ion conductance microscopy (SICM) to measure both the local Li-ion current and topography of battery electrodes.

December 2, 2011
A new composite silicon-defect graphene anode architecture for high-capacity, high-rate Li-ion batteries

High energy density, rapid charging/discharging, and long cycle life are critical performance parameters for electrical energy storage devices, such as Li-ion batteries. In today's Li-ion batteries, graphite is the anode material of choice. The large aspect ratio of the graphitic sheets limits the speed at which lithium can be inserted into the structure and therefore access to the theoretical charge density (capacity) of the electrode (372 mAh/g) at high rate.

October 14, 2011
New opportunities for lithium and oxygen spectroscopy in working batteries using inelastic x-ray scattering

Researchers at Argonne National Laboratory's Center for Electrochemical Energy Science (CEES) are developing a new approach for studying lithium and oxygen spectroscopy in a working battery environment.

September 16, 2011
Spherical crbon with unique architectures and properties

Carbon atoms can be arranged in different ways to yield various structure types, such as graphene (and graphite), diamond, and fullerenes, e.g., hollow nanotubes and spherical ‘buckyballs.’ The properties of carbon are controlled at the nanometer length scale, so there is great potential to tailor their structures during synthesis. Argonne researchers at the Energy Frontier Research Center, the Center for Electrochemical Energy Science, have used a high-temperature, high-pressure autogenic process to fabricate dense and mono-dispersed carbon spheres (2–4 µm in diameter).

December 31, 2010