Abstracts Book - IMRC 2018

• SA1-O015
DEVELOPMENT OF MULTIFUNCTIONAL METAL-ION BATTERIES
BASED ON 1D MATERIALS
Kostiantyn Turcheniuk 1 , Xiaolei Ren 1 , Fujia Wang 1 , Gleb Yushin 1
1 Georgia Institute of Technology, Materials Science and Engineering, United States.
Metal-ion batteries (MIBs) capable of bearing considerable mechanical stress
and maintaining high energy density are developing into highly coveted devices
for weight-sensitive applications such as light aircraft, high-performance
vehicles, and wearable technologies. To accomplish this dual functionality, these
batteries must meet the adequate metrics of mechanical strength and
electrochemical performance. In current state-of-the-art, ceramic 0D particles
are contained within the battery electrodes, what results in the brittle behavior
and endured stresses upon mechanical load. Alternatively, the deployment of
1D ceramics may allow to overcome the above-mentioned problems since the
1D materials are known to exhibit superior strength and toughness. However,
the synthesis methods of 1D ceramic materials are typically elaborative, not
scalable and often require sacrificial templates. In this work we plan to
demonstrate how to entirely bypass the aforementioned limiting manufacturing
processes of ultrastrong and flexible ceramic 1D nanowires for applications in
MIBs. In particular, the synthesis of conformal coatings of active cathode
(LiFePO4, FePO4) and anode materials (Si, V2O5) onto flexible and conducting CNT
substrates to construct a compliant, mechanically robust, and high
power/energy dense LIB will be demonstrated by exploiting Atomic Layer
Deposition’s (ALD) and Chemical Vapor Deposition (CVD) [1]. By rigorously
controlling the layer thickness of the active materials, we systematically study
electrochemical performance of the composite electrodes to balance high rate,
high volumetric and specific capacities with excellent mechanical properties. In
another example, we plan to demonstrate the disruptive technology of ceramic
NWs synthesis using a simple solution method [2]. It is based on the de-alloying
of bulk alloys at moderate reaction conditions in the presence of alcohol
molecules. The product of the reaction is ultra-long metal-organic alkoxides,
which can be easily converted by heat treatment to the corresponding metal
oxide NWs. The latter can be manufactured in the free-standing separator film,
which exhibits flexibility, excellent thermal stability, wettability and
electrochemical performance.