PFI:AIR - TT: Scale-up Dry-Powder based Additive Manufactured Electrodes to Lower the Cost of Li-ion Batteries

PFI:AIR - TT：按比例放大干粉添加剂制造的电极以降低锂离子电池的成本

• 批准号: 1640647
• 负责人: Yan Wang
• 金额: $ 20万
• 依托单位: Worcester Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-15 至 2019-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1640647&HistoricalAwards=false
• 关键词: PFI; AIR; TT; Scale; up

This PFI:Accelerating Innovation Research Technology Translation project focuses on development of a dry powder, roll-to-roll process for manufacturing battery electrodes to replace slurry-based electrode manufacture. This is an additive manufacturing process to be used for the fabrication of Li-ion batteries. The technology is important because it eliminates slurry production, coating, and drying operations from lithium ion battery manufacturing as well as the need to recover and/or dispose of solvent. This has the potential to reduce the capital and operating cost of a battery plant.This project addresses the following technology gaps as it translates from research discovery toward commercial application. (1) Adhesion and cohesion properties of electrodes. With the removal of solvent in additive manufacturing process, the dispersion of the binder materials among other materials can be challenging, which compromises cohesion and adhesion properties. Research will be done to optimize the mixing process, the sequence of adding powders, and the powder dispensing process, in order to achieve uniformly distributed binder, which could lead to high adhesion and cohesion. (2) Electrochemical properties. With the removal of solvent, the manufactured electrode could exhibit structure difference in porosity, tortuosity and pore size, which could affect the electrochemical properties. A detailed study and optimization of each step during the additive manufacturing process, including multi-nozzle spray process and subsequent hot rolling/heat treatments, will be conducted to ensure comparable performance with conventional electrodes. Personnel involved in this project, two graduate students, will receive innovation and entrepreneurship experiences through taking business courses offered at their respective institutions and participating in NSF I-Corps.

这个PFI：加速创新研究技术转化项目的重点是开发一种用于制造电池电极的干粉，卷对卷工艺，以取代基于浆料的电极制造。这是一种用于制造锂离子电池的增材制造工艺。该技术很重要，因为它消除了锂离子电池制造中的浆料生产，涂覆和干燥操作以及回收和/或处理溶剂的需要。这有可能降低电池工厂的资本和运营成本。该项目解决了从研究发现到商业应用的以下技术差距。(1)电极的粘附和内聚性能。随着增材制造工艺中溶剂的去除，粘合剂材料在其他材料中的分散可能是具有挑战性的，这会损害内聚性和粘附性。研究优化混合工艺、粉末添加顺序和粉末分配工艺，以实现均匀分布的粘合剂，从而获得高粘附力和内聚力。(2)电化学性质随着溶剂的去除，所制备的电极在孔隙率、弯曲度和孔径方面会表现出结构差异，这会影响电化学性能。将对增材制造过程中的每个步骤进行详细研究和优化，包括多喷嘴喷涂工艺和随后的热轧/热处理，以确保与传统电极的性能相当。参与该项目的人员（两名研究生）将通过参加各自机构提供的商业课程和参加NSF I-Corps获得创新和创业经验。

项目成果

Simulation of Micro/Nanopowder Mixing Characteristics for Dry Spray Additive Manufacturing of Li-Ion Battery Electrodes

• DOI: 10.1115/1.4037769
• 发表时间: 2017-12
• 期刊: Journal of Micro and Nano-Manufacturing
• 影响因子: 1
• 作者: B. Ludwig;Jin Liu;Yangtao Liu;Zhangfeng Zheng;Yan Wang;H. Pan

Understanding Interfacial‐Energy‐Driven Dry Powder Mixing for Solvent‐Free Additive Manufacturing of Li‐Ion Battery Electrodes

• DOI: 10.1002/admi.201700570
• 发表时间: 2017-09
• 期刊: Advanced Materials Interfaces
• 影响因子: 5.4
• 作者: B. Ludwig;Jin Liu;I-Meng Chen;Yangtao Liu;Wan Shou;Yan Wang;H. Pan

Scalable Dry Printing Manufacturing to Enable Long‐Life and High Energy Lithium‐Ion Batteries

• DOI: 10.1002/admt.201700106
• 发表时间: 2017-10
• 期刊: Advanced Materials Technologies
• 影响因子: 6.8
• 作者: Jin Liu;B. Ludwig;Yangtao Liu;Zhangfeng Zheng;Fan Wang;Ming-Shao Tang;Jiajun Wang;Jia-ling Wang;H. Pan;Yan Wang