Nano- and bulk-silicon-based insertion anodes for lithium-ion secondary cells

A review of the electrochemical performance of alloy anodes for lithium-ion batteries

There are growing concerns over the environmental, climate, and health impacts caused by using non-renewable fossil fuels. The utilization of green energy, including solar and wind power, is believed to be one of the most promising alternatives to support more sustainable economic growth. In this regard, lithium-ion batteries (LIBs) can play a critically important role. To further increase the energy and power densities of LIBs, silicon anodes have been intensively explored due to their high capacity, low operation potential, environmental friendliness, and high abundance. The main challenges for the practical implementation of silicon anodes, however, are the huge volume variation during lithiation and delithiation processes and the unstable solid-electrolyte interphase (SEI) films. Recently, significant breakthroughs have been achieved utilizing advanced nanotechnologies in terms of increasing cycle life and enhancing charging rate performance due partially to the excellent mechanical properties of nanomaterials, high surface area, and fast lithium and electron transportation. Here, the most recent advance in the applications of 0D (nanoparticles), 1D (nanowires and nanotubes), and 2D (thin film) silicon nanomaterials in LIBs are summarized. The synthetic routes and electrochemical performance of these Si nanomaterials, and the underlying reaction mechanisms are systematically described.

Silicon-based Nanomaterials for Lithium-Ion Batteries - A Review

Nanostructured silicon is promising for high capacity anodes in lithium batteries. The specific capacity of silicon is an order of magnitude higher than that of conventional graphite anodes, but the large volume change of silicon during lithiation and delithiation and the resulting poor cyclability has prevented its commercial application. This challenge could potentially be overcome by silicon nanostructures that can provide facile strain relaxation to prevent electrode pulverization, maintain effective electrical contact, and have the additional benefits of short lithium diffusion distances and enhanced mass transport. In this review, we present an overview of rechargeable lithium batteries and the challenges and opportunities for silicon anodes, then survey the performance of various morphologies of nanostructured silicon (thin film, nanowires/nanotubes, nanoparticles, and mesoporous materials) and their nanocomposites. Other factors that affect the performance of nanostructured silicon anodes, including solvent composition, additives, binders, and substrates, are also examined. Finally, we summarize the key lessons from the successes so far and offer perspectives and future challenges to enable the applications of silicon nanoanodes in practical lithium batteries at large scale.

https://www.rsc.org/suppdata/EE/C0/C0EE00281J/C0EE00281J.PDF

Nanostructured silicon for high capacity lithium battery anodes

https://zenodo.org/record/1197134/files/Elsevier%20paper-AAM-20180302.pdf

Silicon based lithium-ion battery anodes: A chronicle perspective review

Amorphous silicon anode for lithium-ion rechargeable batteries

We have observed that B/sub 2/H/sub 6/-doped amorphous silicon (a-Si) showed a faster growth rate of metal-induced lateral crystallization (MILC) than that of undoped a-Si. From the analysis of the microstructure, it was thought that boron atoms could help modify the growth behavior from that of a branched crystal network to unidirectional crystal growth with few branches and that growth rate could to be enhanced. By using this good crystalline structure at the boundary region between the source/drain and channel, we have successfully fabricated p-type poly-Si thin-film transistors with good electrical properties with a MILC process.

Electrical characteristics of MILC poly-Si TFTs with long Ni-offset structure

The effect of dopants on the microstructure of polycrystalline silicon thin film grown by MILC method

We have introduced a new process in metal-induced lateral crystallization (MILC). By adding Co to the Ni-MILC process, the electrical characteristics of MILC poly-Si TFTs were considerably improved. In particular, a considerable decrease of TFT leakage current were achieved in both n-type and p-type devices.

Metal-induced lateral crystallization of a-Si thin films by Ni-Co alloys and the electrical properties of poly-Si TFTs

Electroluminescence quantum dot devices (QD‐LEDs) show the promise in the development of future displays. For commercialization, the top emission device structure is more advantageous than the bottom emission device structure to realize the high aperture ratio full color displays. Moreover, it is essential to understand not only the device structure and characteristics of QD‐LEDs but also the challenging issues in inkjet‐printed devices. Here, we demonstrated the world first all inkjet‐printed Cd‐free active matrix QD‐LEDs based on getting over the hurdles of all inkjet printing process. Especially, we have fabricated QD‐LED devices by stacking 4‐soluble layers without intermixing and studied the factors affecting QD efficiency and QD printing and the influence of ETL solvent on QD. Inkjet‐printed QD‐LED devices have achieved 8 cd/A, 70 cd/A, and 8 cd/A current efficiency of red, green, and blue, respectively, on the basis of 250 nits of full white RGB panels. We believe that our work clarifies an encouraging step toward the practical application of Cd‐free based QD‐LED displays.

Yeo-Geon Yoon

Papers

Amorphous silicon anode for lithium-ion rechargeable batteries

Electrical characteristics of MILC poly-Si TFTs with long Ni-offset structure

The effect of dopants on the microstructure of polycrystalline silicon thin film grown by MILC method

Metal-induced lateral crystallization of a-Si thin films by Ni-Co alloys and the electrical properties of poly-Si TFTs

All inkjet‐printed 6.95″ 217 ppi active matrix QD‐LED display with RGB Cd‐free QDs in the top‐emission device structure