MindMap Gallery Lithium-ion battery anode materials
This is a mind map about anode materials for lithium-ion batteries. The main content includes: germanium-based anode materials, tin-based anode materials, silicon-based materials, carbon-based anode materials, metallic lithium anode materials (not commercialized), titanate Lithium anode material, lithium-ion battery anode material.
Edited at 2024-10-25 15:17:03Rumi: 10 dimensions of spiritual awakening. When you stop looking for yourself, you will find the entire universe because what you are looking for is also looking for you. Anything you do persevere every day can open a door to the depths of your spirit. In silence, I slipped into the secret realm, and I enjoyed everything to observe the magic around me, and didn't make any noise. Why do you like to crawl when you are born with wings? The soul has its own ears and can hear things that the mind cannot understand. Seek inward for the answer to everything, everything in the universe is in you. Lovers do not end up meeting somewhere, and there is no parting in this world. A wound is where light enters your heart.
Chronic heart failure is not just a problem of the speed of heart rate! It is caused by the decrease in myocardial contraction and diastolic function, which leads to insufficient cardiac output, which in turn causes congestion in the pulmonary circulation and congestion in the systemic circulation. From causes, inducement to compensation mechanisms, the pathophysiological processes of heart failure are complex and diverse. By controlling edema, reducing the heart's front and afterload, improving cardiac comfort function, and preventing and treating basic causes, we can effectively respond to this challenge. Only by understanding the mechanisms and clinical manifestations of heart failure and mastering prevention and treatment strategies can we better protect heart health.
Ischemia-reperfusion injury is a phenomenon that cellular function and metabolic disorders and structural damage will worsen after organs or tissues restore blood supply. Its main mechanisms include increased free radical generation, calcium overload, and the role of microvascular and leukocytes. The heart and brain are common damaged organs, manifested as changes in myocardial metabolism and ultrastructural changes, decreased cardiac function, etc. Prevention and control measures include removing free radicals, reducing calcium overload, improving metabolism and controlling reperfusion conditions, such as low sodium, low temperature, low pressure, etc. Understanding these mechanisms can help develop effective treatment options and alleviate ischemic injury.
Rumi: 10 dimensions of spiritual awakening. When you stop looking for yourself, you will find the entire universe because what you are looking for is also looking for you. Anything you do persevere every day can open a door to the depths of your spirit. In silence, I slipped into the secret realm, and I enjoyed everything to observe the magic around me, and didn't make any noise. Why do you like to crawl when you are born with wings? The soul has its own ears and can hear things that the mind cannot understand. Seek inward for the answer to everything, everything in the universe is in you. Lovers do not end up meeting somewhere, and there is no parting in this world. A wound is where light enters your heart.
Chronic heart failure is not just a problem of the speed of heart rate! It is caused by the decrease in myocardial contraction and diastolic function, which leads to insufficient cardiac output, which in turn causes congestion in the pulmonary circulation and congestion in the systemic circulation. From causes, inducement to compensation mechanisms, the pathophysiological processes of heart failure are complex and diverse. By controlling edema, reducing the heart's front and afterload, improving cardiac comfort function, and preventing and treating basic causes, we can effectively respond to this challenge. Only by understanding the mechanisms and clinical manifestations of heart failure and mastering prevention and treatment strategies can we better protect heart health.
Ischemia-reperfusion injury is a phenomenon that cellular function and metabolic disorders and structural damage will worsen after organs or tissues restore blood supply. Its main mechanisms include increased free radical generation, calcium overload, and the role of microvascular and leukocytes. The heart and brain are common damaged organs, manifested as changes in myocardial metabolism and ultrastructural changes, decreased cardiac function, etc. Prevention and control measures include removing free radicals, reducing calcium overload, improving metabolism and controlling reperfusion conditions, such as low sodium, low temperature, low pressure, etc. Understanding these mechanisms can help develop effective treatment options and alleviate ischemic injury.
Lithium-ion battery anode materials
Lithium-ion battery anode materials
Battery anode material selection requirements
The role of negative electrode materials in lithium batteries
Body that stores lithium ions
Reversible insertion/extraction of lithium ions during charging and discharging
Plays an important role in the performance of lithium batteries
Development history of negative electrode materials
Reversible lithium storage mechanism of negative electrode materials
Insertion/extraction, alloying/dealloying
phase transition
transformation reaction
Reversible organic chemical bond breaking
Surface charging: capacitor
free radicals
Deposition/Precipitation
Interface reaction
Classification of negative electrode materials
Metal lithium anode material
Carbon-based negative electrode materials
Silicon-based negative electrode material
Tin-based negative electrode material
Germanium-based negative electrode material
Lithium titanate anode material
Metal lithium anode material (not commercialized)
Structural features
Advantages
High voltage and high energy density
insufficient
Low melting point → safety issues
The reaction product between lithium and electrolyte coats lithium→dispersed lithium
Carbon-based negative electrode materials
Graphite and graphite interlayer compounds
Charging and discharging mechanism of graphite negative electrode materials→formation of graphite interlayer compounds
There is a problem
Graphitized mesophase carbon microspheres
Formation process
Preparation process and method
Advantages and disadvantages
Amorphous carbon materials
Graphitization
soft carbon
hard carbon
Nanostructured carbon materials
carbon nanofiber
Fullerene
carbon nanotubes
graphene
Silicon-based materials
Nano silicon material
Silicon-based thin film materials
Silicon/Metal Alloy Composite Materials
Silicon/carbon composites
Silicone compounds
Main issues with silicon-based anode materials (Volume expansion during lithiation/delithiation)
Active material crushing
The formation of unstable SEI film on the surface of silicon-based negative electrode → loss of lithium ions, Interface resistance increases and battery cycle life decreases
Disruption of electronic conductive networks
Tin-based negative electrode material
Metal tin element
Tin alloy anode material
Tin-based oxide anode material
Tin/carbon composite anode material
Advantages
High theoretical specific capacity
Tin has low redox potential and good conductivity
Abundant reserves and non-toxic
Germanium-based negative electrode material
Advantages
High theoretical specific capacity
Compared with Si, the diffusion speed of lithium ions in Ge is 400 times. Electronic conductivity is 104 times → suitable for high current and high power equipment
insufficient
High price, limiting practical applications
Serious volume expansion problems, electrode detachment and overall Decay of battery capacity and lifespan
modified
Nanoization
carbon coating
Amorphous
porous structure
One-dimensional germanium nanotubes and nanowires, germanium films and other structures
Lithium titanate anode material
spinel structure
Potential 1.55V
Theoretical capacity 175mAh/g (140-160)
Zero strain material (material volume change during charge and discharge process <1%)
Advantages
security
High voltage platform, no Li precipitation
Resistant to overcharge and discharge
Excellent high and low temperature performance
Long life
The structure is stable and has zero strain, and the volume change is basically zero.
No SEI film to avoid SEI film rupture
High magnification - compared to graphite
High ion diffusion coefficient
Can be used in multiple cycle pulse equipment
modified
conductivity
The poor conductivity of lithium titanate needs to be improved through carbon coating/doping
potential window
Use metal to replace part of Ti to reduce the potential
High current charging
Reduce particles/nano → improve rate performance