Research Highlights
Research Highlights
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Sodium-ion batteries: Uncovering the charge storage mechanism of hard carbon
Sodium-ion batteries: Uncovering the charge storage mechanism of hard carbon
Published in Nano Letters
A quantitative study that leads to a new model of sodium ion storage in hard carbon
We’ve quantitatively investigated the effect of local atomic structure on sodium ion storage in amorphous carbon using an exquisitely designed model material with tunable atomic structures from disordered micropores to gradually increased local graphitic order. The quantitative study uncovers the complete picture of Na+ storage in hard carbon, consisting of three main mechanisms with divergent kinetics.
Materials chemistry: Chemical dealloying synthesizes new porous-carbon anode
Materials chemistry: Chemical dealloying synthesizes new porous-carbon anode
Published in Chemistry of Materials
A process that can fabricate a bimodal porous carbon and tune each modal pore size independently
Researchers at AIMR have developed a sequential chemical dealloying technique for synthesizing 3D bimodal porous amorphous carbon with well-defined meso- and micropores. With pore sizes and architecture tunable at the atomic scale, the amorphous-carbon product of this new, scalable process shows excellent performance as a sodium-ion battery anode.
Lithium-ion batteries: Making silicon usable
Lithium-ion batteries: Making silicon usable
Published in ACS nano
Anodes with specially designed nanoarchitectures beat the limitations of silicon anodes
Hybrid silicon anodes for lithium-ion batteries that overcome problems that had previously beset silicon anodes have been created by AIMR researchers. This advance will help increase the energy storage of next-generation lithium-ion batteries.
Lithium–oxygen batteries: Synergism between catalysts boosts efficiency
Lithium–oxygen batteries: Synergism between catalysts boosts efficiency
Published in Nano Letters
Using both solid and liquid catalysts enhances the energy efficiency of lithium–oxygen batteries
Solid and liquid catalysts in a lithium–oxygen rechargeable battery have a synergistic effect that simultaneously boosts the cathode kinetics and energy efficiency of the battery, researchers at the AIMR have found. This points the way to overcome two of the main hurdles to the commercialization of these batteries.
Lithium-ion batteries: Imaging a critical component of batteries
Lithium-ion batteries: Imaging a critical component of batteries
Published in Advanced Energy Materials
A powerful microscopy technique reveals new insights into the least understood part of lithium-ion batteries
Researchers at the AIMR have observed how an ultrathin layer on the negative electrode (anode) of lithium-ion batteries forms, grows and fails during battery operation. The important insights they have gleaned will be useful for developing better and safer lithium-ion batteries.
Nanoporous graphene: High strength and flexibility achieved
Nanoporous graphene: High strength and flexibility achieved
Published in Science Advances
Excellent tensile strength and ductility have been realized in an ultralight, three-dimensional structure made of nanoporous graphene
An ultralight, graphene-based material that is both extremely strong and ductile has been developed by AIMR researchers. These properties make the material promising for a wide range of applications, including those in the aerospace and automotive industries.
Lithium batteries: Electrode boosts storage capacity
Lithium batteries: Electrode boosts storage capacity
Published in Advanced Materials
A porous graphene material can store and release large amounts of lithium
A strong, porous material developed by AIMR researchers has the potential to dramatically increase the amount of energy lithium batteries can store, enabling more time between charging mobile devices.
Nanoporous graphene: New synthetic approach pushes pore size boundaries to mesoscale
Nanoporous graphene: New synthetic approach pushes pore size boundaries to mesoscale
Published in Advanced Materials
A new approach allows for the cost-effective production of nanoporous graphene with hitherto unattainable mesopores
We have developed a nanoporous nickel-carbide-mediated low-temperature graphene growth method for the synthesis of N-doped MG with a 3D bicontinuous porous structure, a small pore size of ≈25 nm, a high concentration of nitrogen dopants, and a large specific surface area.
Nanoporous materials: A universal synthesis
Nanoporous materials: A universal synthesis
Published in Nature Communications
A generic, green route offers an easy way to make an extensive range of useful holey materials with tunable pore sizes
The first universal route to materials containing extensive networks of tiny voids has been developed by AIMR researchers. It is a highly controlled, environmentally friendly approach to make so-called nanoporous materials, which are finding a growing number of applications thanks to their lightness, high internal surface areas, high electrical and thermal conductivities, and fast mass transport.
Lithium–oxygen batteries: Reactions observed under the microscope
Lithium–oxygen batteries: Reactions observed under the microscope
Published in Advanced Materials
A specially designed liquid cell for an electron microscope enables lithium–oxygen batteries to be probed as never before
By using a state-of-the-art electron microscope, AIMR researchers have explored the inner workings of a lithium–oxygen battery. The insights gained from these observations will facilitate the development of high-performance, next-generation batteries.
Lithium–oxygen batteries: Super-sized storage with nanoporous graphene
Lithium–oxygen batteries: Super-sized storage with nanoporous graphene
Published in Advanced Energy Materials
Unconventional electrodes made from three-dimensional graphene structures enable batteries to hold 100 times more charge than conventional lithium-ion cells
By converting flat graphene sheets into three-dimensional (3D) architectures, AIMR researchers have developed a lightweight, metal-free electrode for lithium–oxygen batteries that may have a transformative effect on all-electric vehicles.
High performance microcapacitor on-chip power supplies
High performance microcapacitor on-chip power supplies
Published in Advanced Science
A novel high performance microcapacitor with excellent energy and power densities, for on-chip and MEMS applications
Miniaturization of microelectromechanical systems (MEMS) and electronic devices has fueled the need for highly efficient, reliable and small power sources that can be produced on an industrial scale. Using existing MEMs processing techniques, researchers at the WPI Advanced Institute for Materials Research, Tohoku University, Japan have developed a micro-sized psuedocapacitor (MPC) with excellent energy and power density.
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