Achieving Thermodynamic Stability of Single-Crystal Co-Free Ni-Rich Cathode Material for High Voltage Lithium-Ion Batteries

Jixue Shen; Bao Zhang; Weiyuan HuangXiao LiZhiming XiaoJing WangTao ZhouJianguo WenTongchao LiuKhalil AmineXing Ou

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Achieving Thermodynamic Stability of Single-Crystal Co-Free Ni-Rich Cathode Material for High Voltage Lithium-Ion Batteries

机译：Achieving Thermodynamic Stability of Single-Crystal Co-Free Ni-Rich Cathode Material for High Voltage Lithium-Ion Batteries

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Ni-rich layered cathode materials are progressively considered as thestandard configuration of high-energy electric vehicles by virtues of theirhigh capacity and eliminated “range anxiety.” However, the poor cyclicstability and severe cobalt supply crisis would restrain their wide commercialapplicability. Here, a cost-effective single-crystal Co-free Ni-richcathode material LiNi_(0.8)Mn_(0.18)Fe_(0.02)O_2 (NMF), which outperforms widelycommercial polycrystalline LiNi0.83Co0.11Mn0.06O2 (MNCM) and singlecrystalLiNi_(0.83)Co_(0.11)Mn_(0.06)O_2 (SNCM) is reported. Surprisingly, NMF cancompensate for the reversible capacity loss under the designed conditionsof high-temperature and elevated-voltage, achieving a competitive energydensity compared with conventional MNCM or SNCM. Combining operandocharacterizations and density functional theory calculation, it is revealed thatNMF cathode with improved dynamic structure evolution largely alleviatesthe mechanical strain issue commonly found in Ni-rich cathode, which canreduce the formation of intragranular cracks and improve the safety performance.Consequently, this new Co-free NMF cathode can achieve a perfectequilibrium between material cost and electrochemical performance, whichnot only reduces the production cost by >15%, but also demonstrates excellentthermal stability and cycling performance..

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来源
《Advanced functional materials》 |2023年第23期|2300081.1-2300081.11|共11页
作者
Jixue Shen; Bao Zhang; Weiyuan HuangXiao LiZhiming XiaoJing WangTao ZhouJianguo WenTongchao LiuKhalil AmineXing Ou;
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作者单位

Engineering Research Center of the Ministry of Educationfor Advanced Battery MaterialsSchool of Metallurgy and EnvironmentCentral South UniversityChangsha 410083, P. R. China;

Engineering Research Center of the Ministry of Educationfor Advanced Battery MaterialsSchool of Metallurgy and EnvironmentCentral South UniversityChangsha 410083, P. R. China Zhejiang Power New Energy Co. Ltd.Zhuji 311899, P. R. China;

Chemical Sciences and Engineering DivisionArgonne National LaboratoryLemont, IL 60439, USACenter for Nanoscale MaterialsArgonne National LaboratoryLemont, IL 60439, USAChemical Sciences and Engineering DivisionArgonne National LaboratoryLemont, IL 60439, USA Institute for Research & Medical Consultations (IRMC)Imam Abdulrahman Bin Faisal University (IAU)Dammam 34221, Saudi Arabia Material Science and EngineeringStanford;

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Co-free Ni-rich cathode; single-crystals; thermal stability; reduced materials costs;

Achieving Thermodynamic Stability of Single-Crystal Co-Free Ni-Rich Cathode Material for High Voltage Lithium-Ion Batteries

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