Today, Li-ion batteries (LIB) have been used in many areas such as mobile electronics, electric
vehicles, and large-scale smart grids. Since the first commercialized Li-ion batteries developed by
SONY in 1991, LIBs have made a lot of advances and successfully used in many areas. However,
...
Today, Li-ion batteries (LIB) have been used in many areas such as mobile electronics, electric
vehicles, and large-scale smart grids. Since the first commercialized Li-ion batteries developed by
SONY in 1991, LIBs have made a lot of advances and successfully used in many areas. However,
with the advent of electric vehicles, energy storage system, and smart grid, high energy and power
density required for LIB have increased rapidly. To meet the increasing demand for high-quality LIBs,
various researches are doing such like safety, cyclability, charge rate, gravimetric and volumetric
energy density. In addition, we try to develop next-generation LIB to improved performances
dramatically.
Herein, we demonstrate the LIBs and next-generation LIB anode materials.
In chapter 1, we introduce basic decription of Li-ion battery system(LIBs), anode materials for LIBs,
and challeges in silicon anode.
In chapter 2, we introduce a scalable method of selective extraction of high-quality nano-silicon
from industrial slag. The extraction process is based on thermochemical reduction of silica. Herein,
we use a mixture of metal (e.g. aluminum) and metal halide (e.g. aluminum chloride), we can extract
nano-silicon from at low temperature. Owing to our silicon source industrial slag, synthesized nanosilicon is very cost-effectiveness. Interestingly, extracted nano-silicon have high purity, regular size
(200~300nm), and regular structure, thus it shows improved cyclability.
In chapter 3, we introduce a facile method of synthesis of unique structure Si/C composite. Herein,
we use a Si/SiC wafer waste, silicon chip as the silicon source. SiC can be oxidized endlessly. Owing
to SiC property, we can control the oxidation contents of silicon chip. And using polyacrylonitrile
polymer and oxidized silicon chips, we synthesize unique structure Si/C composite. Owing to unique
structure of Si/C composite, it shows improved cyclability.
Today, Li-ion batteries (LIB) have been used in many areas such as mobile electronics, electric
vehicles, and large-scale smart grids. Since the first commercialized Li-ion batteries developed by
SONY in 1991, LIBs have made a lot of advances and successfully used in many areas. However,
with the advent of electric vehicles, energy storage system, and smart grid, high energy and power
density required for LIB have increased rapidly. To meet the increasing demand for high-quality LIBs,
various researches are doing such like safety, cyclability, charge rate, gravimetric and volumetric
energy density. In addition, we try to develop next-generation LIB to improved performances
dramatically.
Herein, we demonstrate the LIBs and next-generation LIB anode materials.
In chapter 1, we introduce basic decription of Li-ion battery system(LIBs), anode materials for LIBs,
and challeges in silicon anode.
In chapter 2, we introduce a scalable method of selective extraction of high-quality nano-silicon
from industrial slag. The extraction process is based on thermochemical reduction of silica. Herein,
we use a mixture of metal (e.g. aluminum) and metal halide (e.g. aluminum chloride), we can extract
nano-silicon from at low temperature. Owing to our silicon source industrial slag, synthesized nanosilicon is very cost-effectiveness. Interestingly, extracted nano-silicon have high purity, regular size
(200~300nm), and regular structure, thus it shows improved cyclability.
In chapter 3, we introduce a facile method of synthesis of unique structure Si/C composite. Herein,
we use a Si/SiC wafer waste, silicon chip as the silicon source. SiC can be oxidized endlessly. Owing
to SiC property, we can control the oxidation contents of silicon chip. And using polyacrylonitrile
polymer and oxidized silicon chips, we synthesize unique structure Si/C composite. Owing to unique
structure of Si/C composite, it shows improved cyclability.
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