Reconfiguring Hard Carbons with Emerging Sodium‐Ion Batteries: A Perspective

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(31)

Published: Feb. 21, 2023

Abstract Hard carbons, an important category of amorphous are non‐graphitizable and widely accepted as the most promising anode materials for emerging sodium‐ion batteries (SIBs)， because their changeable low‐potential charge/discharge plateaus. However, microstructures not fixed difficult to accurately demonstrate graphites do. The successful use hard carbons in SIBs revives interest clearly picture complicated that close relevance sodium storage. In this review, past definitions structural models revisited first, a renewed understanding storage is presented. Three critical features highlighted namely crystallites, defects, nanopores, which directly responsible presence plateaus reversible extension. impact these upon then deeply discussed sieving finally proposed ideal configuration carbon superhigh This review expected offer clear help realize truly rational design high‐capacity anodes, driving industrialization SIBs, more promisingly open up window exploring possible new uses.

Language: Английский

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Catalytic Defect‐Repairing Using Manganese Ions for Hard Carbon Anode with High‐Capacity and High‐Initial‐Coulombic‐Efficiency in Sodium‐Ion Batteries

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(18)

Published: March 31, 2023

Abstract Hard carbon (HC) anodes have shown extraordinary promise for sodium‐ion batteries, but are limited to their poor initial coulombic efficiency (ICE) and low practical specific capacity due the large amount of defects. These defects with oxygen containing groups cause irreversible sites Na + ions. Highly graphited decreases defects, while potentially blocking diffusion paths Therefore, molecular‐level control graphitization hard open accessible channels ions is key achieve high‐performance carbon. Moreover, it challenging design a conventional method obtain HCs both high ICE capacity. Herein, universal strategy developed as manganese ions‐assisted catalytic carbonization precisely tune degree, eliminate maintain effective paths. The as‐prepared has 92.05% excellent cycling performance. Simultaneously, sodium storage mechanism “adsorption‐intercalation‐pore filling‐sodium cluster formation” proposed, clear description given boundaries pore structure dynamic process filling.

Language: Английский

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One stone two birds: Pitch assisted microcrystalline regulation and defect engineering in coal-based carbon anodes for sodium-ion batteries

Energy storage materials, Journal Year: 2023, Volume and Issue: 56, P. 532 - 541

Published: Jan. 26, 2023

Language: Английский

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Doping Regulation in Polyanionic Compounds for Advanced Sodium‐Ion Batteries

Small, Journal Year: 2022, Volume and Issue: 19(1)

Published: Nov. 14, 2022

It has long been the goal to develop rechargeable batteries with low cost and cycling life. Polyanionic compounds offer attractive advantages of robust frameworks, long-term stability, cost-effectiveness, making them ideal candidates as electrode materials for grid-scale energy storage systems. In past few years, various polyanionic electrodes have synthesized developed sodium storage. Specifically, doping regulation including cation anion shown a great effect in tailoring structures achieve extraordinary electrochemical performance. this review, recent progress sodium-ion (SIBs) is summarized, their underlying mechanisms improving properties are discussed. Moreover, challenges prospects design advanced SIBs put forward. anticipated that further versatile strategies developing high-performance devices can be inspired.

Language: Английский

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CO₂‐Etching Creates Abundant Closed Pores in Hard Carbon for High‐Plateau‐Capacity Sodium Storage

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(3)

Published: Nov. 29, 2023

Abstract Hard carbon (HC) has become the most promising anode material for sodium‐ion batteries (SIBs), but its plateau capacity at ≈0.1 V (Na + /Na) is still much lower than that of graphite (372 mAh g −1 ) in lithium‐ion (LIBs). Herein, a CO 2 ‐etching strategy applied to generate abundant closed pores starch‐derived hard effectively enhances Na storage. During etching, open are first formed on matrix, which situ reorganized through high‐temperature carbonization. This ‐assisted pore‐regulation increases diameter and HC, simultaneously maintains microsphere morphology (10–30 µm diameter). The optimal HC exhibits Na‐storage 487.6 with high initial Coulomb efficiency 90.56%. A record‐high 351 achieved, owing micropores generated by ‐etching. Comprehensive ex tests unravel storage performance originates from pore‐filling mechanism micropores.

Language: Английский

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Rational design of MXene-MoS2 heterostructure with rapid ion transport rate as an advanced anode for sodium-ion batteries

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 457, P. 141363 - 141363

Published: Jan. 6, 2023

Language: Английский

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Nonaqueous Liquid Electrolytes for Sodium‐Ion Batteries: Fundamentals, Progress and Perspectives

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(40)

Published: Sept. 13, 2023

Abstract Sodium‐ion batteries (SIBs), driven by sustainability and cost advantage, have been recognized as one of the most promising electrochemical energy storage devices. Electrolytes, unique component that not only ionically connect while insulating electronically electrodes but also determine eventual improvements in performance mainly regarding cycle life, Coulombic efficiency, density, safety, hold key to practical implementation SIBs. In this review, fundamental design principles Na + ‐ion electrolytes chemical properties cation over Li terms ion transport, salt dissolution, solvation structure are first discussed. Then, a sequence crucial experimental discoveries strategical achievements field for SIBs presented, with focuses on ether‐based co‐intercalation into graphite, diluted highly concentrated electrolytes, wide temperature range nonflammable indispensable electrolyte components (functional additives new sodium salts). Finally, detailed analysis research trends practically feasible is presented aid ongoing quest better future.

Language: Английский

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W‐Doping Induced Efficient Tunnel‐to‐Layered Structure Transformation of Na_0.44Mn_1‐xW_xO₂: Phase Evolution, Sodium‐Storage Properties, and Moisture Stability

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(21)

Published: April 20, 2023

Abstract Na 0.44 MnO 2 is a promising cathode material for sodium‐ion batteries owing to its excellent cycling stability and low cost. However, insufficient sodium storage sites still hinder practical applications. Herein, facile strategy induce the efficient structural transformation from tunnel layered type of by trace W‐doping first time reported. The not only enriches but also improves performance. As result, phase‐pure P2‐Na Mn 0.99 W 0.01 O demonstrates an enhanced reversible specific capacity 195.5 mAh g −1 energy density 517 Wh kg at 0.1 C, accompanying superior with retention 80% over 200 cycles. Moreover, W‐doped samples show high structure in moist atmosphere can maintain original electrochemical performance after water treatment. In situ ex characterizations reveal electrodes. This work provides on engineering transition metal oxides tunnel‐to‐layered could shed light design construction stable high‐capacity materials.

Language: Английский

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Releasing Free Radicals in Precursor Triggers the Formation of Closed Pores in Hard Carbon for Sodium‐Ion Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(26)

Published: March 26, 2024

Abstract Increasing closed pore volume in hard carbon is considered to be the most effective way enhance electrochemical performance sodium‐ion batteries. However, there a lack of systematic insights into formation mechanisms pores at molecular level. In this study, regulation strategy via adjustment content free radicals reported. Sufficient are exposed by part delignification bamboo, which related well‐developed layers and rich pores. addition, excessive from nearly total lead more reactive sites during pyrolysis, competes for limited precursor debris form smaller microcrystals therefore compact material. The optimal sample delivers large 0.203 cm 3 g −1 , leads high reversible capacity 350 mAh 20 mA enhanced Na + transfer kinetics. This work provides level, enabling rational design structures.

Language: Английский

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Revitalizing sodium-ion batteries via controllable microstructures and advanced electrolytes for hard carbon

eScience, Journal Year: 2023, Volume and Issue: 4(3), P. 100181 - 100181

Published: Sept. 1, 2023

Sodium-ion batteries (SIBs) with low cost and high safety are considered as an electrochemical energy storage technology suitable for large-scale storage. Hard carbon, which is inexpensive has both capacity sodium potential, regarded the most promising anode commercial SIBs. However, commercialization of hard carbon still faces technical issues initial Coulombic efficiency, poor rate performance, insufficient cycling stability, due to intrinsically irregular microstructure carbon. To address these challenges, rational design crucial achieving high-performance SIBs, via gaining in-depth understanding its structure–performance correlations. In this context, our review firstly describes mechanism from perspective microstructure's formation. We then summarize state-of-art development providing a critical overview emergence in terms precursor selection, design, electrolyte regulation optimize strategies addressing practical problems. Finally, we highlight directions future achieve believe will serve basic guidance stimulate more exciting research into other types devices.

Language: Английский

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