MindMap Gallery Lithium-rich manganese-based cathode materials
This is a mind map about lithium-rich manganese-based cathode materials. The main content includes: commercial lithium battery cathodes and lithium-rich manganese-based cathodes. Comparison of cathode performance, XRD images of lithium-rich manganese-based materials, synthesis methods of lithium-rich manganese-based material precursors, common modification methods of lithium-rich manganese-based materials, main issues of lithium-rich manganese-based materials, energy storage mechanism, structure and characteristics.
Edited at 2024-10-25 15:12:13Rumi: 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-rich manganese base Cathode material
Structure and characteristics
Structural features
Local cation ordering
The ratio of structural elements and preparation conditions are closely related to
Characteristics compared to other ternary materials
atomic structure
Electrochemical characteristics
superlattice structure
single phase solid solution
two-phase composite solid solution
Energy storage mechanism
First charge and discharge curve characteristics
Lithium ion movement trajectory during the cycle
Advantages of lithium-rich manganese-based materials
Lithium-rich manganese-based materials Main questions
Low first Coulomb efficiency
Irreversible oxygen release
At high potential, the electrolyte decomposes at the electrode interface (main role)
Capacity and voltage attenuation
Oxygen redox reaction, layered structure → spinel structure transformation
Migration and valence state changes of transition metal ions during cycling
Poor rate performance
Diffusion kinetics of lithium ions
Interfacial charge transfer reaction
Lithium-rich manganese-based materials Common modification methods
Cover
Prevent electrolyte from corroding electrode materials
Doping (improving crystal structure stability)
bulk doping
surface doping
Crystal plane control
Make it grow in a direction conducive to the movement of lithium ions
surface integrated structure
Degradation originates from surface→inside
Material surface properties are key to achieving reversible high capacity
Lithium-rich manganese-based materials Precursor synthesis method
Co-precipitation method
carbonate type
Hydroxide type
Advantages and Disadvantages
sol-gel method
Hydrothermal method, solvothermal method
spray drying
solid phase method
XRD images of lithium-rich manganese-based materials
Commercial lithium battery cathode and lithium-rich manganese base Positive electrode performance comparison
structure
Discharge average versus lithium potential
Theoretical discharge specific capacity
Actual discharge specific capacity