Self-Assembled Epitaxial Cathode-Electrolyte Nanocomposites for 3D Microbatteries.
Daniel M CunhaNicolas GauquelinRui XiaJohan VerbeeckMark HuijbenPublished in: ACS applied materials & interfaces (2022)
The downscaling of electronic devices requires rechargeable microbatteries with enhanced energy and power densities. Here, we evaluate self-assembled vertically aligned nanocomposite (VAN) thin films as a platform to create high-performance three-dimensional (3D) microelectrodes. This study focuses on controlling the VAN formation to enable interface engineering between the LiMn 2 O 4 cathode and the (Li,La)TiO 3 solid electrolyte. Electrochemical analysis in a half cell against lithium metal showed the absence of sharp redox peaks due to the confinement in the electrode pillars at the nanoscale. The (100)-oriented VAN thin films showed better rate capability and stability during extensive cycling due to the better alignment to the Li-diffusion channels. However, an enhanced pseudocapacitive contribution was observed for the increased total surface area within the (110)-oriented VAN thin films. These results demonstrate for the first time the electrochemical behavior of cathode-electrolyte VANs for lithium-ion 3D microbatteries while pointing out the importance of control over the vertical interfaces.
Keyphrases
- ion batteries
- carbon nanotubes
- solid state
- gold nanoparticles
- reduced graphene oxide
- ionic liquid
- visible light
- molecularly imprinted
- quantum dots
- single cell
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- cell therapy
- high throughput
- high intensity
- stem cells
- electron transfer
- atomic force microscopy
- bone marrow
- mass spectrometry
- high resolution
- solid phase extraction
- high speed
- liquid chromatography