Achieving Highly Proton‐Resistant Zn–Pb Anode through Low Hydrogen Affinity and Strong Bonding for Long‐Life Electrolytic Zn//MnO₂Battery

Advanced Materials, Год журнала: 2023, Номер 35(31)

Опубликована: Май 20, 2023

High-energy electrolytic Zn//MnO2 batteries show potential for grid-scale energy storage, but the severe hydrogen evolution corrosion (HEC) caused by acidic electrolytes results in subdued durability. Here, an all-around protection strategy is reported achieving stable Zn metal anodes. First, a proton-resistant Pb-containing (Pb and Pb(OH)2 ) interface constructed on anode (denoted as Zn@Pb), which situ forms PbSO4 during H2 SO4 protects substrate from HEC. Second, to improve plating/stripping reversibility of Zn@Pb, Pb(CH3 COO)2 additive Zn@Pb-Ad) introduced, triggers precipitation releases trace Pb2+ that can dynamically deposit Pb layer plating suppress The superior HEC resistance stems low affinity H+ , well strong bonding between Pb-Zn or Pb-Pb, increase reaction overpotential barrier. Consequently, Zn@Pb-Ad//MnO2 battery runs stably 630 795 h 0.2 0.1 m electrolytes, respectively, are >40 times better than bare Zn. as-prepared A h-level achieves one-month calendar life, opening door next generation high-durable batteries.

Язык: Английский

---

Design Strategies for Aqueous Zinc Metal Batteries with High Zinc Utilization: From Metal Anodes to Anode-Free Structures

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Янв. 4, 2024

Aqueous zinc metal batteries (AZMBs) are promising candidates for next-generation energy storage due to the excellent safety, environmental friendliness, natural abundance, high theoretical specific capacity, and low redox potential of (Zn) metal. However, several issues such as dendrite formation, hydrogen evolution, corrosion, passivation Zn anodes cause irreversible loss active materials. To solve these issues, researchers often use large amounts excess ensure a continuous supply materials anodes. This leads ultralow utilization squanders density AZMBs. Herein, design strategies AZMBs with discussed in depth, from utilizing thinner foils constructing anode-free structures 100%, which provides comprehensive guidelines further research. Representative methods calculating depth discharge different first summarized. The reasonable modification foil anodes, current collectors pre-deposited Zn, aqueous (AF-AZMBs) improve then detailed. In particular, working mechanism AF-AZMBs is systematically introduced. Finally, challenges perspectives high-utilization presented.

Язык: Английский

---

Alleviating Side Reactions on Zn Anodes for Aqueous Batteries by a Cell Membrane Derived Phosphorylcholine Zwitterionic Protective Layer

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(31)

Опубликована: Июнь 19, 2023

Aqueous zinc (Zn) ion batteries are attractive for next generation with high safety, yet their applications still hindered by the uncontrollable dendrite formation and side reactions on Zn anode. Here, a polyzwitterion protective layer (PZIL) was engineered polymerizing 2-methacryloyloxyethyl phosphorylcholine (MPC) in carboxymethyl chitosan (CMCS), which renders following merits: choline groups of MPC can preferentially adsorb onto metal to avoid reactions; charged phosphate chelate Zn2+ regulate solvation structure, further improving reaction inhibition; Hofmeister effect between ZnSO4 CMCS enhance interfacial contact during electrochemical characterization. Consequently, symmetrical battery PZIL keep stable more than 1000 hours under ultra-high current density 40 mA cm-2 . The confers Zn/MnO2 full Zn/active carbon (AC) capacitor cycling performance density.

Язык: Английский

---

Solvation Modulation Enhances Anion‐Derived Solid Electrolyte Interphase for Deep Cycling of Aqueous Zinc Metal Batteries

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(38)

Опубликована: Июль 31, 2023

Stable Zn anodes with a high utilization efficiency pose challenge due to notorious dendrite growth and severe side reactions. Therefore, electrolyte additives are developed address these issues. However, the always consumed by electrochemical reactions over cycling, affecting cycling stability. Here, hexamethylphosphoric triamide (HMPA) is reported as an additive for achieving stable of anodes. HMPA reshapes solvation structures promotes anion decomposition, leading in situ formation inorganic-rich solid-electrolyte-interphase. More interestingly, this decomposition does not involve HMPA, preserving its long-term impact on electrolyte. Thus, symmetric cells survive ≈500 h at 10 mA cm-2 mAh or ≈200 40 rate 85.6 %. The full Zn||V2 O5 exhibit record-high cumulative capacity even under lean condition (E/C ratio=12 μL mAh-1 ), limited supply (N/P ratio=1.8) areal (6.6 ).

Язык: Английский

---

Reshaping Zinc Plating/Stripping Behavior by Interfacial Water Bonding for High‐Utilization‐Rate Zinc Batteries

Advanced Materials, Год журнала: 2023, Номер 35(49)

Опубликована: Авг. 2, 2023

Abstract Aqueous zinc batteries have emerged as promising energy storage devices; however, severe parasitic reactions lead to the exacerbated production of Zn dendrites that decrease utilization rate anodes. Decreasing electrolyte content and regulating water activity are efficient means address these issues. Herein, this work shows limiting aqueous bonding bacterial cellulose (BC) can suppress side regulate stable plating/stripping. This approach makes it possible use less limited foil. A symmetric cell assembles with hydrogel (electrolyte‐to‐capacity ratio E/C = 1.0 g (Ah) −1 ) cycled stably at a current density 6.5 mA cm −2 achieved capacity h depth discharge 85%. Full cells BC delivers 212 retention 83% after 1000 cycles 5 . offers new fundamental insights into effect restricting reshape plating/stripping process provides route for designing novel electrolytes better stabilize efficiently utilize

Язык: Английский

---

Dynamic Zn/Electrolyte Interphase and Enhanced Cation Transfer of Sol Electrolyte for All‐Climate Aqueous Zinc Metal Batteries

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(34)

Опубликована: Июль 4, 2023

Zn metal as one of the promising anodes aqueous batteries possesses notable advantages, but it faces severe challenges from side reactions and notorious dendrite growth. Here, ultrathin nanosheets α-zirconium phosphate (ZrP) are explored an electrolyte additive. The not only create a dynamic reversible interphase on also promote Zn2+ transportation in electrolyte, especially outer Helmholtz plane near ZrP. Benefited enhanced kinetics interphase, pouch cells Zn||LiMn2 O4 using this remarkably improve electrochemical performance under harsh conditions, i.e. powders anode, high mass loading, wide temperatures. results expand materials available for provide insightful understanding charge transfer realize combination all-climate performance.

Язык: Английский

---

Constructing Solid Electrolyte Interphase for Aqueous Zinc Batteries

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(47)

Опубликована: Авг. 19, 2023

Abstract Problems of zinc anode including dendrite and hydrogen evolution seriously degrade the performance batteries. Solid electrolyte interphase (SEI), which plays a key role in achieving high reversibility lithium aprotic organic solvent, is also beneficial to improvement aqueous electrolyte. However, various studies about for electrode quite fragmented, lack deep understanding on root causes or general design rules SEI construction. And water molecules with reactivity brings serious challenge effective Here, we reviewed brief development history batteries firstly, then summarized approaches construct Furthermore, formation mechanisms behind are systematically analyzed, together discussion components evaluation electrochemical types SEI. Meanwhile, between lab industrialization discussed.

Язык: Английский

---

Interface Engineering by Hydrophilic and Zincophilic Aluminum Hydroxide Fluoride for Anode‐Free Zinc Metal Batteries at Low Temperature

Advanced Energy Materials, Год журнала: 2023, Номер 13(20)

Опубликована: Апрель 7, 2023

Abstract Anode‐free batteriesgreatly promote overall energy density, but they require an extremely high Coulombic efficiency (CE, >99.7%) to function normally. It becomes very challenging in aqueous batteries, because of water‐related parasitic reactions and dendrite growth on Zn anodes. Herein, aluminum hydroxide fluoride coated Cu foils (Cu@AOF) is used realize the anode‐free batteries. AOF exhibits a adsorption affinity H 2 O low diffusion barrier for adatoms, promoting desolvation process surface migration. Meanwhile, strong interaction between 2+ enables it regulate flux benefit lateral growth. Then, full cells Cu@AOF||Zn 0.5 VO exhibit record‐high cycle life 2000 cycles at 1 A g −1 with ultra‐high average CE 99.95%. More impressively, cell shows long 400 99.94% −20 °C. This work provides sheds light rational engineering electrode interfaces obtain excellent performance temperatures.

Язык: Английский

---

Balancing Interfacial Reactions through Regulating p‐Band Centers by an Indium Tin Oxide Protective Layer for Stable Zn Metal Anodes

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(40)

Опубликована: Авг. 11, 2023

Abstract Metallic zinc (Zn) is considered as one of the most attractive anode materials for post‐lithium metal battery systems owing to high theoretical capacity, low cost, and intrinsic safety. However, Zn dendrites parasitic side reaction impede its application. Herein, we propose a new principle regulating p ‐band center oxide protective coating balance adsorption energy migration barrier effective deposition stripping. Experimental results calculations indicate that benefiting from uniform zincophilic nucleation sites fast transport on indium tin (ITO), highly stable reversible can be achieved. As result, I−Zn symmetrical cell achieves deposition/stripping with an extremely overpotential 9 mV superior lifespan over 4000 h. The Cu/I−Zn asymmetrical exhibits long lifetime cycles average coulombic efficiency 99.9 %. Furthermore, assembled I−Zn/AC full excellent 70000 nearly 100 % capacity retention. This work provides general strategy insight construction efficient protection layer.

Язык: Английский

---

Machine Learning‐Assisted Property Prediction of Solid‐State Electrolyte

Advanced Energy Materials, Год журнала: 2024, Номер 14(20)

Опубликована: Фев. 14, 2024

Abstract Machine learning (ML) exhibits substantial potential for predicting the properties of solid‐state electrolytes (SSEs). By integrating experimental or/and simulation data within ML frameworks, discovery and development advanced SSEs can be accelerated, ultimately facilitating their application in high‐end energy storage systems. This review commences with an introduction to background SSEs, including explicit definition, comprehensive classification, intrinsic physical/chemical properties, underlying mechanisms governing conductivity, challenges, future developments. An in‐depth explanation methodology is also elucidated. Subsequently, key factors that influence performance are summarized, thermal expansion, modulus, diffusivity, ionic reaction energy, migration barrier, band gap, activation energy. Finally, it offered perspectives on design prerequisites upcoming generations focusing real‐time property prediction, multi‐property optimization, multiscale modeling, transfer learning, automation high‐throughput experimentation, synergistic optimization full battery, all which crucial accelerating progress SSEs. aims guide novel SSE materials practical realization efficient reliable technologies.

Язык: Английский

---