Na-site coordination environment regulation of Mn-based phosphate cathodes for sodium-ion batteries with elevated working voltage and energy density

Wang, Kairong; Gao, Chenxi; Tu, Jian; Guo, Kunkun; Ding, Yuan-Li

doi:10.1039/d3ta07300a

J. Mater. Chem. A

2024

DOI: 10.1039/d3ta07300a

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Na-site coordination environment regulation of Mn-based phosphate cathodes for sodium-ion batteries with elevated working voltage and energy density

Kairong Wang,

Chenxi Gao,

Jian Tu

et al.

Abstract: Mn-based sodium superionic conductor (NASICON) phosphate cathodes have been considered as new promising candidates for high-energy, low-cost and relatively environmentally friendly sodium ion batteries (SIBs). Such cathodes, however, suffer from...

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Cited by 9 publications

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Enabling One‐Step De‐Sodiation of Na₄MnV(PO₄)₃ Cathode via Regulating Coordination Environment for High‐Power and Long‐Lasting Sodium‐Ion Batteries

Chen,

Wang,

Deng

et al. 2024

Adv Funct Materials

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Na4MnV(PO4)3 (NMVP) is considered as a promising cathode candidate for sodium‐ion batteries (SIBs) because it possesses a higher voltage plateau of 3.6 V (Mn3+/Mn2+) besides the voltage plateau of 3.4 V (V4+/V3+), lower cost, and environmental benign compared to Na3V2(PO4)3. However, such cathode still suffers from sluggish intrinsic Na+ diffusion kinetics and the Jahn‐Teller distortion of Mn3+, leading to low capacity and poor cycling performance. Particularly, the second‐step Na+ de‐sodiation in NMVP is the rate‐determining step owing to a lower chemical diffusion coefficient with one order of magnitude than that of the first‐step counterpart. To address these issues, a coordination environment regulation strategy is reported to develop a one‐step de‐sodiation NMVP cathode via introducing Zr4+ and K+/Ca2+ into Mn and Na sites, respectively. Based on theoretical calculations and electrochemical evaluation, the obtained Na3.3K0.1Ca0.1Mn0.8VZr0.2(PO4)3 exhibits much enhanced Na+ diffusion and efficiently inhibits the Jahn‐Teller distortion. Importantly, such modification significantly facilitates the second‐step Na+ diffusion of NMVP, realizing one‐step de‐sodiation. When employed as a cathode for SIBs, such cathode shows a specific capacity of 73 mAh g−1 (15 C), and capacity retentions of 92.7% after 3000 cycles (at 10 C, room temperature), and 72.6% after 1000 cycles (1 C, 50 °C).

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Enabling One‐Step De‐Sodiation of Na₄MnV(PO₄)₃ Cathode via Regulating Coordination Environment for High‐Power and Long‐Lasting Sodium‐Ion Batteries

Chen,

Wang,

Deng

et al. 2024

Adv Funct Materials

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Approaching Ultimate Synthesis Reaction Rate of Ni-Rich Layered Cathodes for Lithium-Ion Batteries

Liu,

Zhang,

Luo

et al. 2024

Nano-Micro Lett.

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Nickel-rich layered oxide LiNixCoyMnzO2 (NCM, x + y + z = 1) is the most promising cathode material for high-energy lithium-ion batteries. However, conventional synthesis methods are limited by the slow heating rate, sluggish reaction dynamics, high energy consumption, and long reaction time. To overcome these challenges, we first employed a high-temperature shock (HTS) strategy for fast synthesis of the NCM, and the approaching ultimate reaction rate of solid phase transition is deeply investigated for the first time. In the HTS process, ultrafast average reaction rate of phase transition from Ni0.6Co0.2Mn0.2(OH)2 to Li- containing oxides is 66.7 (% s−1), that is, taking only 1.5 s. An ultrahigh heating rate leads to fast reaction kinetics, which induces the rapid phase transition of NCM cathodes. The HTS-synthesized nickel-rich layered oxides perform good cycling performances (94% for NCM523, 94% for NCM622, and 80% for NCM811 after 200 cycles at 4.3 V). These findings might also assist to pave the way for preparing effectively Ni-rich layered oxides for lithium-ion batteries.

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Optimization Strategies of Na3V2(PO4)3 Cathode Materials for Sodium-Ion Batteries

Hu,

Li,

Liang

et al. 2024

Nano-Micro Lett.

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Na3V2(PO4)3 (NVP) has garnered great attentions as a prospective cathode material for sodium-ion batteries (SIBs) by virtue of its decent theoretical capacity, superior ion conductivity and high structural stability. However, the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density, which strictly confine its further application in SIBs. Thus, it is of significance to boost the sodium storage performance of NVP cathode material. Up to now, many methods have been developed to optimize the electrochemical performance of NVP cathode material. In this review, the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are well summarized and discussed, including carbon coating or modification, foreign-ion doping or substitution and nanostructure and morphology design. The foreign-ion doping or substitution is highlighted, involving Na, V, and PO43− sites, which include single-site doping, multiple-site doping, single-ion doping, multiple-ion doping and so on. Furthermore, the challenges and prospects of high-performance NVP cathode material are also put forward. It is believed that this review can provide a useful reference for designing and developing high-performance NVP cathode material toward the large-scale application in SIBs.

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Na-site coordination environment regulation of Mn-based phosphate cathodes for sodium-ion batteries with elevated working voltage and energy density

Abstract: Mn-based sodium superionic conductor (NASICON) phosphate cathodes have been considered as new promising candidates for high-energy, low-cost and relatively environmentally friendly sodium ion batteries (SIBs). Such cathodes, however, suffer from...

Cited by 9 publications

References 34 publications

Enabling One‐Step De‐Sodiation of Na₄MnV(PO₄)₃ Cathode via Regulating Coordination Environment for High‐Power and Long‐Lasting Sodium‐Ion Batteries

Enabling One‐Step De‐Sodiation of Na₄MnV(PO₄)₃ Cathode via Regulating Coordination Environment for High‐Power and Long‐Lasting Sodium‐Ion Batteries

Approaching Ultimate Synthesis Reaction Rate of Ni-Rich Layered Cathodes for Lithium-Ion Batteries

Optimization Strategies of Na3V2(PO4)3 Cathode Materials for Sodium-Ion Batteries

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Na-site coordination environment regulation of Mn-based phosphate cathodes for sodium-ion batteries with elevated working voltage and energy density

Abstract: Mn-based sodium superionic conductor (NASICON) phosphate cathodes have been considered as new promising candidates for high-energy, low-cost and relatively environmentally friendly sodium ion batteries (SIBs). Such cathodes, however, suffer from...

Cited by 9 publications

References 34 publications

Enabling One‐Step De‐Sodiation of Na4MnV(PO4)3 Cathode via Regulating Coordination Environment for High‐Power and Long‐Lasting Sodium‐Ion Batteries

Enabling One‐Step De‐Sodiation of Na4MnV(PO4)3 Cathode via Regulating Coordination Environment for High‐Power and Long‐Lasting Sodium‐Ion Batteries

Approaching Ultimate Synthesis Reaction Rate of Ni-Rich Layered Cathodes for Lithium-Ion Batteries

Optimization Strategies of Na3V2(PO4)3 Cathode Materials for Sodium-Ion Batteries

Contact Info

Product

Resources

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Enabling One‐Step De‐Sodiation of Na₄MnV(PO₄)₃ Cathode via Regulating Coordination Environment for High‐Power and Long‐Lasting Sodium‐Ion Batteries

Enabling One‐Step De‐Sodiation of Na₄MnV(PO₄)₃ Cathode via Regulating Coordination Environment for High‐Power and Long‐Lasting Sodium‐Ion Batteries