Improved Initial Charging Capacity of Na-poor Na0.44MnO2 via Chemical Presodiation Strategy for Low-cost Sodium-ion Batteries

Zhou, Xi; Lai, Yangyang; Wu, Xiangjiang; Chen, Zhongxue; Zhong, Faping; Ai, Xinping; Cao, Yong

doi:10.1007/s40242-021-0438-6

“…Unfortunately, PAHs generally have extremely low redox potentials (~0.1 V vs . Na + /Na), which could easily cause over‐sodiation and structural deterioration of the treated cathode [8] . Therefore, how to design cathode‐specific presodiation reagent with controllable redox potential and sodiation degree still remains challenging.…”

Section: Figurementioning

confidence: 99%

“…[3][4][5] Most cathode materials for SIB are off-stoichiometric compounds because they can better accommodate large-sized Na + ions. Some typical offstoichiometric cathode materials such as Na 0.44 MnO 2 [6][7][8] (NMO), Na 0.67 Ni 0.33 Mn 0.67 O 2 [9] (NNMO), Na 4À α M 2 + α/2 (P 2 O 7 ) 2 and stoichiometric cathode materials like Na 4 V 2 (PO 4 ) 3 (NVP), Na 3 V 2 (PO 4 ) 2 F 3 (NVPF) have shown considerably long-cycling life in SIBs, whereas their inherent sodiumdeficient nature renders low initial charge capacity and exorbitantly high ICE (discharge/charge), which substantially restricts their matching with the hard carbon anode with low ICE in the full-cell. Presodiation has been validated as a feasible approach to alleviate these concerns.…”

mentioning

confidence: 99%

“…In previous work, we have demonstrated that the reaction between the NMO electrode and the presodiation reagent can proceed spontaneously due to their large potential difference. [8] Na-9-FN-DME and NaÀ BP-DME were employed as mild presodiation reagents, and a typical PAHs-based presodiation solution (NaÀ Pyr-DME) was used as a comparison. The It is observed that the initial charge capacity of PS-NMO electrode presodiated with NaÀ BP-DME for 1 min is increased to 106.9 mAh g À 1 .…”

mentioning

confidence: 99%

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Aromatic Ketones as Mild Presodiating Reagents toward Cathodes for High‐Performance Sodium‐Ion Batteries

Zhang,

Wang,

Chen

et al. 2024

Angewandte Chemie

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0

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Chemical presodiation (CP) is an effective strategy to enhance energy density of sodium ion batteries. However, the sodiation reagents reported so far are basically polycyclic aromatic hydrocarbons (PAHs) wth low reductive potential (~0.1 V vs. Na+/Na), which could easily cause over‐sodiation and structural deterioration of the presodiated cathodes. In this work, Aromatic ketones (AKs) are rationally designed as mild presodiating reagents by introducing a carbonyl group (C=O) into PAHs to balance the conjugated and inductive effect. As the representatives, two compounds 9‐Fluorenoneb (9‐FN) and Benzophenone (BP) manifest favorable equilibrium potential of 1.55 V and 1.07 V (vs. Na+/Na), respectively. Note that 9‐FN demonstrates versatile presodiating capability toward multiple Na uptake hosts (tunneled Na0.44MnO2, layered Na0.67Ni0.33Mn0.67O2, polyanionic Na4Fe2.91(PO4)2P2O7, Na3V2(PO4)3 and Na3V2(PO4)2F3), enabling greatly improved initial charging capacity of the cathode to balance the irrevisible capacity of the anode. Our results indicate that the Aromatic ketones are competitive presodiating cathodic reagents for high‐performance sodium‐ion batteries, and will inspire more studies and application attempts in the future.

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“…Tunnel oxides are generally considered as a promising candidate for ASIBs profiting from fast Na + diffusion in a wide S-shaped tunnel half occupied by Na + . 72,81,82 Na 0.44 MnO 2 is one of the appealing representatives in the tunnel oxide families due to its shortened diffusion path, fast transfer kinetics, and exceptional overcharge tolerance. 83 Na 0.44 MnO 2 //AC full cell achieved a reversible capacity of 45 mAh g −1 with no evident capacity fading over 1000 cycles in 1 mol L −1 Na 2 SO 4 (Figure 7D), while a reversible capacity of 77.3 mAh g −1 with an impressive capacity retention of 89% over 10,000 cycles in 6 mol L −1 NaOH.…”

Section: Cathode Materialsmentioning

confidence: 99%

“…Tunnel oxides are generally considered as a promising candidate for ASIBs profiting from fast Na + diffusion in a wide S‐shaped tunnel half occupied by Na + 72,81,82 . Na 0.44 MnO 2 is one of the appealing representatives in the tunnel oxide families due to its shortened diffusion path, fast transfer kinetics, and exceptional overcharge tolerance 83 .…”

Section: Issues and Challenges Facing Competitive Behaviors Of Asibsmentioning

confidence: 99%

Issues and challenges facing aqueous sodium‐ion batteries toward practical applications

Rao,

Chen,

Su

et al. 2023

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Aqueous sodium‐ion batteries (ASIBs) have attracted widespread attention in the energy storage and conversion fields due to their benefits in high safety, low cost, and environmental friendliness. However, compared with the sodium‐ion batteries born in the same period, the commercialization of ASIB has been significantly delayed. Although great efforts have been made on the electrode/electrode design and interface regulation, the performance of ASIBs is far from the practical requirements. This review first comprehensively compared ASIBs and lead acid batteries in terms of battery structure, performance, sustainable manufacturing, circular economy, and environmental impact. Then, the issues and challenges relevant to the unfavorable behaviors of ASIBs are discussed in detail, such as low energy density caused by narrow electrochemical stability window of water, limited choice of electrode materials, unstable electrode/electrolyte interface, immature battery manufacturing technology, and so forth. We hope that this review provides pertinent insight into the research focus and rational design of applicable ASIBs.

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Aromatic Ketones as Mild Presodiating Reagents toward Cathodes for High‐Performance Sodium‐Ion Batteries

Zhang,

Wang,

Chen

et al. 2024

Angew Chem Int Ed

Self Cite

17

0

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Chemical presodiation (CP) is an effective strategy to enhance energy density of sodium ion batteries. However, the sodiation reagents reported so far are basically polycyclic aromatic hydrocarbons (PAHs) wth low reductive potential (~0.1 V vs. Na+/Na), which could easily cause over‐sodiation and structural deterioration of the presodiated cathodes. In this work, Aromatic ketones (AKs) are rationally designed as mild presodiating reagents by introducing a carbonyl group (C=O) into PAHs to balance the conjugated and inductive effect. As the representatives, two compounds 9‐Fluorenoneb (9‐FN) and Benzophenone (BP) manifest favorable equilibrium potential of 1.55 V and 1.07 V (vs. Na+/Na), respectively. Note that 9‐FN demonstrates versatile presodiating capability toward multiple Na uptake hosts (tunneled Na0.44MnO2, layered Na0.67Ni0.33Mn0.67O2, polyanionic Na4Fe2.91(PO4)2P2O7, Na3V2(PO4)3 and Na3V2(PO4)2F3), enabling greatly improved initial charging capacity of the cathode to balance the irrevisible capacity of the anode. Our results indicate that the Aromatic ketones are competitive presodiating cathodic reagents for high‐performance sodium‐ion batteries, and will inspire more studies and application attempts in the future.

show abstract

Improved Initial Charging Capacity of Na-poor Na0.44MnO2 via Chemical Presodiation Strategy for Low-cost Sodium-ion Batteries

Cited by 13 publications

References 29 publications

Aromatic Ketones as Mild Presodiating Reagents toward Cathodes for High‐Performance Sodium‐Ion Batteries

Aromatic Ketones as Mild Presodiating Reagents toward Cathodes for High‐Performance Sodium‐Ion Batteries

Issues and challenges facing aqueous sodium‐ion batteries toward practical applications

Aromatic Ketones as Mild Presodiating Reagents toward Cathodes for High‐Performance Sodium‐Ion Batteries

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