2020
DOI: 10.1016/j.cej.2019.123649
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Construction of hierarchical K0.7Mn0.7Mg0.3O2 microparticles as high capacity & long cycle life cathode materials for low-cost potassium-ion batteries

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Cited by 72 publications
(50 citation statements)
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“…The results revealed that heteroatom substitution in layered oxides is highly effective in improving the structural stability by moderating the extent of the irreversible multiphase transformation. Furthermore, heteroatomsubstituted K x MO 2 , such as P3-K 0.48 Mn 0.4 Co 0.6 O 2 , [142] P3-K 0.4 Mn 0.9 Mg 0.1 O 2 , [143] P3-K 0.7 Mn 0.7 Mg 0.3 O 2 , [55] P2-K 2 NiCoTeO 6 , [144] P3-K 0.48 Ni 0.2 Co 0.2 Mn 0.6 O 2 , [145] P3-K 0.45 Mn 0.5 Co 0.5 O 2 , [146] P3-K 0.45 Mn 0.8 Fe 0.2 O 2 , [147] P2-K 0.44 Ni 0.22 Mn 0.78 O 2 , [148] and K 2 M 2 TeO 6 (M = Ni, Mg, Zn, Co and Cu), [31] displayed appreciable K + storage properties owing to the tuned reaction dynamics by suppressing certain phase transitions and improving the electrical properties.…”
Section: Existing Challenges and Optimization Strategies For Layered K X Momentioning
confidence: 99%
“…The results revealed that heteroatom substitution in layered oxides is highly effective in improving the structural stability by moderating the extent of the irreversible multiphase transformation. Furthermore, heteroatomsubstituted K x MO 2 , such as P3-K 0.48 Mn 0.4 Co 0.6 O 2 , [142] P3-K 0.4 Mn 0.9 Mg 0.1 O 2 , [143] P3-K 0.7 Mn 0.7 Mg 0.3 O 2 , [55] P2-K 2 NiCoTeO 6 , [144] P3-K 0.48 Ni 0.2 Co 0.2 Mn 0.6 O 2 , [145] P3-K 0.45 Mn 0.5 Co 0.5 O 2 , [146] P3-K 0.45 Mn 0.8 Fe 0.2 O 2 , [147] P2-K 0.44 Ni 0.22 Mn 0.78 O 2 , [148] and K 2 M 2 TeO 6 (M = Ni, Mg, Zn, Co and Cu), [31] displayed appreciable K + storage properties owing to the tuned reaction dynamics by suppressing certain phase transitions and improving the electrical properties.…”
Section: Existing Challenges and Optimization Strategies For Layered K X Momentioning
confidence: 99%
“…[143] Besides, HC anode has also been used in PIB full cells to validate the performance of the novel cathode materials, excellent cyclic performances have been achieved both in the half cells and full cells. [144] Particularly, SIB full cells are of great interest due to their huge potential as next-generation batteries for grid-scale ESSs. Polyanionic compounds, oxides, and PBAs are the major choices of cathode materials for SIB full cells (Figure 15a), and the anodes are carbonaceous materials, chalcogenides, titanium compounds, and elements, et al The Li metal can form alloy with aluminum (Al) at low voltage potential, while the Na metal does not.…”
Section: Full Cellsmentioning
confidence: 99%
“…[ 41,44–46 ] In addition, too much substitution of electrochemically inactive Mg elements in the oxide layer is disadvantageous to the specific capacity. [ 41 ] In spite of this, dopants such as Mg, Ni, and Co decrease the Mn 3+ content and effectively suppress the Jahn − Teller distortion in the MnO 6 octahedra during the electrochemical reaction. For instance, Liu et al reported that a ternary P3‐type K 0.67 Ni 0.17 Co 0.17 Mn 0.66 O 2 delivered a reversible capacity of 77 mAh g −1 in the voltage range 2.0 − 4.3 V. [ 47 ] Although the capacity was smaller, a good cycling performance with a capacity retention of 87% after 100 cycles was achieved.…”
Section: Layered Transition Metal Oxidesmentioning
confidence: 99%
“…The substituted and doped M elements can be electrochemically active, for example, Ni, Co, Mn, Fe, Cr, or inactive, for example, Mg, Al, Sb.reactions at high temperature, which were also characterized Fe, Co, Ni, and Mg doped (or substituted) K x M y Mn 1-y O 2 demonstrated smooth charge/discharge profiles and improved electrochemical performances, including capacity, cycling stability, and rate capability (Figure 5a-c). [37][38][39][40][41][42][43][44] P3-type K 0.7 Fe 0.5 Mn 0.5 O 2 , K 0.54 Co 0.5 Mn 0.5 O 2, and K 0.45 Co 0.5 Mn 0.5 O 2 with high substitution contents (y = 0.5) have been successfully synthesized by researchers, respectively. [37,38,40] However, to balance the valence state in K-deficient K x M y Mn 1-y O 2 , Mg and Ni contents are usually lower than 0.33.…”
Section: Binary and Ternary M Systemsmentioning
confidence: 99%
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