Anode‐Free Alkali Metal Batteries: From Laboratory to Practicability

Xu, Peng; Huang, Fei; Sun, Yanyan; Lei, Yongpeng; Cao, Xinxin; Liang, Shuquan; Fang, Guozhao

doi:10.1002/adfm.202406080

Cited by 5 publications

(1 citation statement)

References 228 publications

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“…Among next-generation batteries, sodium-ion batteries (SIBs) have received wide attention due to their cost advantages and sustainability. − However, compared to mature lithium-ion batteries, the limited energy density of SIBs emerges as a significant challenge to their industrialization. Exciting oxygen redox reactions in the cathode, particularly in layered oxides, is a common approach to overcome the limitations of energy density imposed by traditional transition metal ion (TM) reactions for SIBs. − However, they are prone to structural instability for the cathode materials.…”

Section: Introductionmentioning

confidence: 99%

Reversible Oxygen Redox Chemistry in High-Entropy P2-Type Manganese-Based Cathodes via Self-Regulating Mechanism

Zhou,

Li,

Lin

et al. 2024

ACS Appl. Mater. Interfaces

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The irreversible oxygen-redox reactions in the high-voltage region of sodium-layered cathode materials lead to poor capacity retention and structural instability during cycling, presenting a significant challenge in the development of high-energydensity sodium-ion batteries. This work introduces a high-entropy design for layered Na 0.67 Li 0.1 Co 0.1 Cu 0.1 Ni 0.1 Ti 0.1 Mn 0.5 O 2 (Mn-HEO) cathode with a self-regulating mechanism to extend specific capacity and energy density. The oxygen redox reaction was activated during the initial charging process, accompanied by the self-regulation of active elements, enhancing the ionic bonds to form a vacancy wall near the TM vacancies and thus preventing the migration of transition metal elements. Systematic in situ/ex situ characterizations and theoretical calculations comprehensively support the understanding of the self-regulation mechanism of Mn-HEO. As a result, the Mn-HEO cathode exhibits a stable structure during cycling. It demonstrates almost zero strain within a wide voltage range of 2.0−4.5 V with a remarkable specific capacity (177 mAh g −1 at 0.05 C) and excellent long-term cycling stability (87.6% capacity retention after 200 cycles at 2 C). This work opens a new pathway for enhancing the stability of oxygen-redox chemistry and revealing a mechanism of crystal structure evolution for high-energy-density layered oxides.

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Section: Introductionmentioning

confidence: 99%

Reversible Oxygen Redox Chemistry in High-Entropy P2-Type Manganese-Based Cathodes via Self-Regulating Mechanism

Zhou,

Li,

Lin

et al. 2024

ACS Appl. Mater. Interfaces

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Hyperspectral and Weather Resistant Biomimetic Leaf Enabled by Interlayer Confinement

Yang,

Liu,

Liu

et al. 2024

Adv Funct Materials

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Mimicking the characteristics and achieving specific functions of biological systems is stirring but challenging. Generally, pigments in the commercial coating can only achieve a similarity in chromaticity, while cannot obtain a similarity in the solar reflective spectrum whose difficulty resides in simulating spectral characteristics simultaneously. Unfortunately, traditional organic pigments show poor weather and heat resistance. Herein, with the little difference in the color difference (ΔEab*), the high spectral similarity, as well as adjustable green peak and similar red edge slope compared with the common plants (pagoda tree leaf, etc.) in 400–2500 nm, is also attained. It is achieved by the interlayer confined organic pigment in Mg/Al‐layered double hydroxide (Mg/Al‐LDH) layers. The corresponding biomimetic leaf displays high hyperspectral performance with a spectral angle cosine of 0.9922 and heat resistance at 120 °C. The longer weather resistance than that of mechanical mixing is also demonstrated. The intercalated chromophores of sodium copper chlorophyllin in the Mg/Al‐LDH and the interlayer confinement of Mg/Al‐LDH contribute to the excellent performance. This work provides a green pigment and a biomimetic leaf requiring the same chromaticity and spectrum as green plants, filling the long‐term use demand gap for heat and weather‐resistant biomimetic vegetation.

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Anchoring Multi‐Coordinated Bismuth Metal Atom Sites on Honeycomb‐Like Carbon Rods Achieving Advanced Potassium Storage

Chen,

Lin,

Tan

et al. 2024

Adv Funct Materials

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Carbonaceous materials are recognized for their high conductivity and adaptable structures, making them potential candidates for potassium‐ion batteries (PIBs). Yet, their application has been restricted due to challenges like limited potassium storage and slow kinetics. Addressing these issues, this study presents a novel method by anchoring nitrogen‐oxygen‐coordinated bismuth metal atom sites onto honeycomb‐like carbon rods, termed Bi‐N4‐O2@HCR. This aims to enhance PIB performance by exploiting carbonaceous materials' strengths and mitigating their limitations. Through comprehensive experiments and theoretical simulations, it is found that Bi‐N4‐O2 sites enrich potassium storage and facilitate potassium ion migration, thus improving transport efficiency and reaction kinetics. The resulting anode showcased rapid and durable potassium storage, with a remarkable capacity of 190.7 mAh g−1 at 30 A g−1 and maintaining 192.2 mAh g−1 over 4200 cycles at 5 A g−1, outperforming many existing carbon anodes. Additionally, in full cell tests, it exhibited excellent rate performance and ultra‐long cycle life, sustaining up to 8000 cycles with a stable capacity of 88.9 mAh g−1 at 5 A g−1. This research underscores the significance of incorporating unique metal sites on carbon substrates to advance battery technology.

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Anode‐Free Alkali Metal Batteries: From Laboratory to Practicability

Cited by 5 publications

References 228 publications

Reversible Oxygen Redox Chemistry in High-Entropy P2-Type Manganese-Based Cathodes via Self-Regulating Mechanism

Reversible Oxygen Redox Chemistry in High-Entropy P2-Type Manganese-Based Cathodes via Self-Regulating Mechanism

Hyperspectral and Weather Resistant Biomimetic Leaf Enabled by Interlayer Confinement

Anchoring Multi‐Coordinated Bismuth Metal Atom Sites on Honeycomb‐Like Carbon Rods Achieving Advanced Potassium Storage

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