Browsing by Author "Li, Shuke"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Direct and Rapid High-Temperature Upcycling of Degraded Graphite(Wiley, 2023-06-27) Li, Tangyuan; Tao, Lei; Xu, Lin; Meng, Taotao; Clifford, Bryson Callie; Li, Shuke; Zhao, Xinpeng; Rao, Jiancun; Lin, Feng; Hu, LiangbingRecycling the degraded graphite is becoming increasingly important, which can helped conserve natural resources, reduce waste, and provide economic and environmental benefits. However, current regeneration methods usually suffer from the use of harmful chemicals, high energy and time consumption, and poor scalability. Herein, we report a continuously high-temperature heating (≈2000 K) process to directly and rapidly upcycle degraded graphite containing impurities. A sloped carbon heater is designed to provide the continuous heating source, which enables robust control over the temperature profile, eliminating thermal barrier for heat transfer compared to conventional furnace heating. The upcycling process can be completed within 0.1 s when the degraded graphite rolls down the sloped heater, allowing us to produce the upcycled graphite on a large scale. High-temperature heating removes impurities and enhances the graphitization degree and (002) interlayer spacing, making the upcycled graphite more suitable for lithium intercalation and deintercalation. The assembled upcycled graphite||Li cell displays a high reversible capacity of ≈320 mAh g−1 at 1 C with a capacity retention of 96% after 500 cycles, comparable to current state-of-the-art recycled graphite. The method is a chemical-free, rapid, and scalable way to upcycle degraded graphite, and is adaptable to recycle other electrode materials.Item Ultrahigh-Temperature Melt Printing of Multi-Principal Element Alloys(Nature Portfolio, 2022-11-07) Wang, Xizheng; Zhao, Yunhao; Chen, Gang; Zhao, Xinpeng; Liu, Chuan; Sridar, Soumya; Pizano, Luis Fernando Ladinos; Li, Shuke; Brozena, Alexandra H.; Guo, Miao; Zhang, Hanlei; Wang, Yuankang; Xiong, Wei; Hu, LiangbingMulti-principal element alloys (MPEA) demonstrate superior synergetic properties compared to single-element predominated traditional alloys. However, the rapid melting and uniform mixing of multi-elements for the fabrication of MPEA structural materials by metallic 3D printing is challenging as it is difficult to achieve both a high temperature and uniform temperature distribution in a sufficient heating source simultaneously. Herein, we report an ultrahigh-temperature melt printing method that can achieve rapid multielemental melting and uniform mixing for MPEA fabrication. In a typical fabrication process, multi-elemental metal powders are loaded into a hightemperature column zone that can be heated up to 3000 K via Joule heating, followed by melting on the order of milliseconds and mixing into homogenous alloys, which we attribute to the sufficiently uniform high-temperature heating zone. As proof-of-concept, we successfully fabricated single-phase bulk NiFeCrCo MPEA with uniform grain size. This ultrahigh-temperature rapid melt printing process provides excellent potential toward MPEA 3D printing