Porous Anode Active Material with Inserted Conductive Network
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Solution Overview
Problem
Lithium rechargeable batteries face challenges in achieving high energy density and efficient charge and discharge processes, as well as suppressing metal ion precipitation, which affects their performance and longevity.
Innovation Solution
The anode of a secondary battery is designed with a negative electrode active material layer that includes pores on its surface, into which a conductive material is inserted. This conductive material, such as super P or carbon black, is strategically placed to enhance electrical conductivity and prevent metal ion precipitation, improving charge and discharge efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional anode structure without pores is used, then manufacturing is simpler, but charge and discharge efficiency is insufficient
Solution Approach 1:
The anode active material is designed with a porous structure where pores are formed on the surface. Conductive material is inserted into these pores to create conductive networks that enhance electron transport pathways, thereby improving charge and discharge efficiency without significantly complicating the manufacturing process
Solution Approach 2:
The anode is constructed as a composite structure combining the anode active material with conductive material inserted into its pores. This composite approach creates synergistic effects where the conductive material fills the pores to establish efficient electron transport pathways while the anode active material provides the electrochemical reaction sites
2Reliability
If conventional anode structure is used, then structure is simpler, but metal ion precipitation occurs
Solution Approach 1:
The porous structure of the anode active material with conductive material inserted into the pores provides numerous nucleation sites and uniform distribution pathways for metal ions during deposition, preventing localized concentration and subsequent precipitation that would occur in conventional non-porous structures
Solution Approach 2:
The conductive material inserted into the pores acts as an intermediary between the anode active material and the metal ions in the electrolyte. It facilitates uniform electron distribution and provides controlled deposition surfaces, preventing direct uncontrolled metal ion reduction and precipitation on the anode active material surface
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 solution results in improved charge and discharge efficiency and reduced metal ion precipitation, leading to enhanced performance and extended lifespan of lithium rechargeable batteries.
Implementation Method 1
the conductive material is inserted into the pore of the negative electrode active material
Implementation Method 2
the negative electrode active material includes at least one pore formed on its surface
Data Source
AI summary
An anode and a secondary battery including the anode, which can improve charge and discharge efficiency and can reduce or suppress precipitation of metal ions, are provided. The anode includes a negative electrode active material layer on a current collector, the negative electrode active material layer including a negative electrode active material, a binder, and a conductive material. The negative electrode active material includes at least one pore on a surface thereof, and the conductive material is located at the pore of the negative electrode active material.