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High energy density lithium battery systems: from key cathode materials to pouch cell design
Chengrong Xu1, Bo Peng1, Wujie Yang1
1College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China. hszhou@nju.edu.cn.
Achieving high-energy-density lithium battery systems requires advancements beyond current lithium-ion technology. This review explores cathode materials and pouch cell designs for next-generation lithium metal batteries (LMBs) to reach over 500 Wh kg-1.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Current lithium-ion batteries with graphite anodes have limited energy density (~350 Wh kg-1).
- The demand for high-energy-density storage systems necessitates exploring beyond current technologies.
- Lithium metal batteries (LMBs) offer a pathway to significantly higher energy densities.
Purpose of the Study:
- To systematically review pathways for achieving high-energy and durable LMBs.
- To analyze key cathode materials and pouch cell configurations for practical energy density enhancement.
- To provide guidelines for the development of next-generation energy storage.
Main Methods:
- Comprehensive review of scientific literature on cathode materials and battery configurations.
- Analysis of fundamental characteristics and challenges of five promising cathode types (Li-cobalt oxide, high-nickel oxide, Li-rich oxide, sulfur, oxygen).
- Evaluation of the impact of pouch cell components on energy density and practical performance.
Main Results:
- Identified five key cathode materials with potential for ultra-high energy density in LMBs.
- Summarized challenges and feasible solutions for improving cathode performance and durability.
- Detailed the influence of pouch cell design elements on overall energy density.
Conclusions:
- Optimizing cathode materials and pouch cell design is crucial for realizing high-energy-density LMBs.
- Addressing material limitations and component interactions is essential for practical application.
- This review provides a roadmap for advancing energy storage technologies beyond 500 Wh kg-1.
