Nitrogen-Doped Anode Structure for Stable Lithium Electrodeposition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium batteries using lithium metal anodes face challenges with the formation of lithium dendrites, leading to short circuits and reduced lifespan.
Innovation Solution
An anode structure is developed with an anode current collector, an electrodeposition induction layer made of amorphous carbon with a nitrogen element, and a protective layer, which enhances uniform lithium electrodeposition and suppresses dendrite growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If lithium metal is used as anode active material to increase theoretical electric capacity, then electric capacity is improved, but dendrites are formed causing short circuit and reduced lifespan
Solution Approach 1:
A protective layer comprising a polymer and a lithium salt is introduced as an intermediary between the lithium metal anode and the electrolyte. This protective layer acts as a mediator that prevents direct harmful interactions while allowing beneficial lithium ion transport, thereby suppressing dendrite formation and improving battery lifespan while maintaining high electric capacity
Solution Approach 2:
The invention changes the physical and chemical parameters of the anode interface by introducing a protective layer with specific composition (polymer and lithium salt). This modifies the local environment at the anode surface, controlling lithium ion deposition behavior and preventing dendrite formation through altered interfacial properties
2Quantity of substance
If lithium metal is used as anode active material to increase theoretical electric capacity, then electric capacity is improved, but side reaction with electrolyte causes dendrite formation
Solution Approach 1:
The protective layer serves as an intermediary substance that physically separates the lithium metal from the electrolyte, preventing direct side reactions. This intermediary layer allows selective lithium ion transport while blocking harmful interactions that lead to dendrite formation
Solution Approach 2:
The invention converts the potentially harmful direct contact between lithium metal and electrolyte into a beneficial controlled interaction through the protective layer. The side reaction issue is transformed into an opportunity to create a stable interfacial structure that promotes uniform lithium deposition and suppresses dendrites
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed anode structure improves the cycle characteristics and energy density of lithium batteries by preventing dendrite formation and ensuring stable lithium electrodeposition.
Implementation Method 1
an electrodeposition induction layer disposed on the anode current collector and including a first carbon-based material
Data Source
AI summary
An anode and a lithium battery including the same, wherein the anode includes an anode current collector, an electrodeposition induction layer on the anode current collector and including a first carbon-based material, and a protective layer on the electrodeposition induction layer, wherein the first carbon-based material is amorphous carbon including a nitrogen element, and a content of the nitrogen element is more than or equal to about 1 wt % with respect to the total weight of the electrodeposition induction layer.