Sn-Mn-Ni-oxide Anode Material for High-Capacity Secondary Batteries
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Solution Overview
Problem
Current secondary lithium batteries face limitations due to low capacity and stability issues, particularly with graphite as the common electrode material, which restricts their performance in applications like electric vehicles and large-scale power storage.
Innovation Solution
Development of anode and cathode materials using tin-manganese-nickel oxide (Sn-Mn-Ni-oxide) and lithium-tin-manganese-nickel oxide (Li-Sn-Mn-Ni-oxide) with specific compositions and structures, enhancing charge and discharge capacity retention rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If graphite is used as electrode material, then the battery structure is simple and easy to manufacture, but the capacity is low (theoretical value of 372 mAh/g) and performance is limited
Solution Approach 1:
The patent employs composite oxide materials comprising multiple metal elements (such as Li-Mn-Ni-Co-Al-O system) to create electrode materials that combine the advantages of different metals. This composite approach enables achieving high capacity while maintaining structural stability and manufacturability, directly resolving the contradiction between using simple graphite and achieving high performance.
2Quantity of substance
If high capacity electrode materials are used, then the battery energy density increases, but the stability and cycle life deteriorate
Solution Approach 1:
The patent systematically optimizes the compositional parameters of the oxide materials, controlling the ratios of different metal elements and oxygen content to achieve the desired balance between capacity and stability. By precisely adjusting these parameters, the material delivers high capacity while maintaining excellent cycling stability.
Solution Approach 2:
The multi-element oxide composite structure provides both high capacity and enhanced stability through synergistic effects of different metal elements, where each component contributes specific properties that collectively resolve the capacity-stability trade-off.
3Device complexity
If traditional electrode materials are used, then the manufacturing process is simple, but the charge and discharge cycle life is short
Solution Approach 1:
The patent optimizes critical parameters including particle size distribution, surface area, and compositional ratios of the oxide materials to enhance cycle life while keeping the manufacturing process relatively straightforward. These parameter optimizations enable prolonged battery operation without requiring complex manufacturing steps.
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 new electrode materials provide improved stability and higher capacity retention, outperforming traditional graphite-based batteries with increased charge and discharge efficiency and extended cycle life.
Implementation Method 1
The anode material for the secondary battery includes tin-manganese-nickel (Sn—Mn—Ni)-oxide... The cathode material for the secondary battery includes lithium-tin-manganese-nickel (Li—Sn—Mn—Ni)-oxide
Data Source
AI summary
An electrode material for a secondary battery and a secondary battery are provided. The electrode material for the secondary battery includes tin-manganese-nickel-oxide. The secondary battery includes a cathode, an anode, an electrolyte, and a package structure, wherein the anode includes the electrode material for the secondary battery.