Anode Active Material with Metal Salt for Battery Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current secondary batteries using high-potential materials as anode active materials do not achieve sufficient battery characteristics, necessitating improvements in energy density, cycle stability, and chemical stability during charge and discharge.
Innovation Solution
Incorporating an anode active material with an electrode compound that inserts and extracts lithium at a potential of 1 V to 3 V, combined with a metal salt containing carboxylic acid and sulfonic acid compounds, which enhances chemical stability and suppresses decomposition reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high-potential materials are used as anode active materials, then volume change during charge and discharge is reduced, but battery characteristics such as energy density and cycle stability are insufficient
Solution Approach 1:
The patent uses a composite anode structure combining aluminum powder (high-potential material) with graphite powder (low-potential material). The aluminum powder provides volume stability while the graphite powder enhances battery characteristics including energy density and cycle stability. This composite approach resolves the contradiction by integrating materials with complementary properties.
Solution Approach 2:
The patent optimizes the ratio of aluminum powder to graphite powder to control the overall potential of the anode. By adjusting this parameter, the battery achieves both volume stability (from aluminum) and improved battery characteristics (from optimized composition). The metal salt additive further modifies electrochemical parameters to enhance performance.
2Device complexity
If conventional anode materials are used, then battery structure is simple, but gas generation occurs and cycle characteristics deteriorate
Solution Approach 1:
The patent introduces metal salts (such as lithium halides) as intermediary substances in the electrolyte that mediate between the anode and electrolyte. These intermediaries suppress decomposition reactions and gas generation without significantly complicating the overall battery structure. The metal salts form protective interfaces that prevent harmful reactions.
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 configuration significantly improves battery characteristics by stabilizing the anode during charge and discharge, reducing gas generation, and enhancing cycle retention and energy density.
Implementation Method 1
an anode active material that inserts and extracts an electrode reactant at a potential (a potential to lithium) of 1 V to 3 V both inclusive
Implementation Method 2
a metal salt containing carboxylic acid and sulfonic acid compounds, which enhances chemical stability and suppresses decomposition reactions
Data Source
AI summary
A secondary battery includes: a cathode; an anode; and a nonaqueous electrolytic solution. The anode includes an anode active material containing an electrode compound, the electrode compound inserting and extracting an electrode reactant at a potential (a potential to lithium) of 1 V to 3 V both inclusive, and a metal salt containing one or both of a carboxylic acid compound and a sulfonic acid compound.