Single-Crystal Li1+x[Ni0.6Mn0.4]1-xO2 Made By All-Dry Synthesis

• DOI: 10.1149/ma2023-022231mtgabs
• Publication Date: 2024-02-08T19:15:55Z
• Authors: Matthew D. L. Garayt; Ning Zhang; Svena Yu; Jeffin James Abraham; Aidan Murphy; Roee Omessi; Ziwei Ye; Saad Azam; Michel B. Johnson; Chongyin Yang; Jeff R. Dahn
• Keywords: Crystal (programming language)

Single-crystal LiMO 2 (M = 3d transition metal such as Ni, Mn, Al, and Co) has received much attention a positive electrode material over the last few years due to its superior cycling stability conventional polycrystalline materials 1 . Moreover, Co fallen out-of-favour of choice relatively high cost human rights abuses associated with mining 3 As well, synthesis requires complex co-precipitation equipment that not only increases manufacture, but also produces waste Na SO 4 Furthermore, coating W on particles’ surface in separate step after improves electrochemical performance these Therefore, Co-free, coated, single-crystal materials, made simple process like LiNi 0.6 Mn 0.4 O (NM64) are most interest. In this presentation, simple, solvent- waste-free method is shown create NM64 without coating. This all-dry uses mixture metallic MnO , LiOH·H O, an optional precursor, along two three heating steps, agglomeration separation produce NM64. The resulting R-3m phase pure ≤4% Ni Li layer contains trace residual lithium. Additionally, NM64’s grain size between 5 µm, Fig. 1a), which can be tuned by addition during initial rather than step. While inhibits growth interdiffusion largely unaffected according unit cell parameters obtained from Rietveld refinement their XRD patterns. 1b) illustrates while retain 91% original capacity 100 cycles at C/5, matching vendor material, when added they outperform it 93% retained capacity. It believed incredibly could adopted easily into current commercial manufacturing facilities reduce complexity, cost, time manufacture. Figure 1. (a) shows SEM micrographs synthesized W. (b) half coin compared material. References J. et al., J Electrochem Soc 164 A1534–A1544 (2017). Mining.com https://www.mining.com/markets/. P. Otamonga Poté, Geochem Explor 208 106394 (2020). D. Rathore ACS Energy Lett 7 2189–2195 (2022).