Pr doped single-crystal LiNi0.5Mn0.3Co0.2O2 cathode enables high rate capability and cycle stability for lithium ion batteries
Source abstract
Abstract
The massive application of single crystal (SC) ternary cathode material LiNi 1- x - y Mn x Co y O 2 is largely restricted by the unsatisfactory rate capability which is caused by the sluggish Li + diffusion and structural instability. Herein, Pr 3+ , a large radius ion is introduced to single-crystal LiNi 0.5 Mn 0.3 Co 0.2 O 2 to enhance Li + conductivity and structural stability . With 0.4% Pr doping, the Li(Ni 0.5 Mn 0.3 Co 0.2 ) 0.996 Pr 0.004 O 2 cathode displays a capacity retention of 79.72% at 10 C, and a 98.17% capacity retention after 50 cycles at 25 °C and 96.3% capacity retention after 50 cycles at 55 °C within a 3.0–4.5 V voltage window. Electrochemical impedance spectroscopy confirms that the Pr doping can effectively lower the charge-transfer resistance and facilitate the transportation of Li + on the surface of LiNi 0.5 Mn 0.3 Co 0.2 O 2 . The Direct current internal resistance result implies that the structure of the Pr-doped cathode particles is more stable during cycling. In addition, differential scanning calorimetry measurements measurement combined with in situ X-ray diffraction confirms the thermo-stabilization effect of the Pr dopant .
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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