Customized design of electrolytes for high-safety and high-energy-density lithium batteries

Zhai, Fangfang; Zhou, Qian; Lv, Zhaolin; Wang, Yuanyuan; Zhou, Xinhong; Cui, Guanglei

doi:10.1016/j.enchem.2022.100082

“…[7][8][9][10] All-solid-state electrolytes are a promising candidate with significant safety advantages relative to liquid electrolytes, [11,12] and some works have achieved great success for the all-solid-state energy storage materials. [13][14][15][16] However, maintaining interfacial compatibility and electrochemical stability was challenging. [17,18] Solid polymer electrolytes (SPE) have been studied extensively for their high flexibility, light weight, and ease of preparation, and are considered to be among the most suitable electrolytes for commercial battery production processes.…”

Section: Introductionmentioning

confidence: 99%

Building Stable Solid‐State Potassium Metal Batteries

Lyu,

Yu,

Lv

et al. 2024

View full text Add to dashboard Cite

Solid‐state potassium metal batteries (SPMBs) are promising candidates for the next generation of energy storage systems for their low cost, safety, and high energy density. However, full SPMBs have not yet been reported due to the K dendrites, interfacial incompatibility, and limited availability of suitable solid‐state electrolytes. Here, we present stable SPMBs using a new iodinated solid polymer electrolyte (ISPE). The functional ions reconstruct ion transport channels, providing efficient potassium ion transport. ISPE shows a combination of high ionic conductivity, superior interfacial compatibility, and electrochemical stability. In‐situ alloying and iodinated interlayer increase K metal compatibility for prolonged cycling with low polarization. Moreover, the ISPE enables SPMBs with Prussian blue cathode stable operation at a high voltage of 4.5 V, a superior rate capability, and long‐term cycling over 3,000 cycles (4.2 V versus K+/K) with an ultra‐high coulombic efficiency of 99.94%. More importantly, a classic solid‐state potassium metal pouch cell achieved 4.2 V stable cycling over 800 cycles with an high retention of 93.6%, presenting a new development strategy for secure and high‐performance rechargeable solid‐state potassium metal batteries.This article is protected by copyright. All rights reserved

show abstract

“…[1,2] Solid-state polymer electrolytes have garnered significant attention in the realm of SSLMBs due to their lightweight, low-cost, bonding, flexibility, and large-scale manufacturing ability. [3][4][5][6] Electrochemically stable SPEs for application to LMA and highnickel layered oxide cathode (e.g., LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811)) cells appear to be promising for increasing the specific energy of batteries to 450 Wh kg À 1 and 1000 Wh L À 1 . [7,8] However, poor interfacial contact and difficult-to-inhibit interfacial layer evolution constrain the further application of polymer electrolytes in high-voltage SSLMBs in practice.…”

Section: Introductionmentioning

confidence: 99%

“…The all‐solid‐state batteries (ASSBs) design strategy employing solid‐state electrolytes has the potential to materialize high‐safety and high‐specific energy electrical storage systems, mainly owing to its availability to apply lithium‐metal anode (LMA) (with theoretical capacities of about 3860 mAh g −1 and 2061 mAh cm −3 ) [1,2] . Solid‐state polymer electrolytes have garnered significant attention in the realm of SSLMBs due to their lightweight, low‐cost, bonding, flexibility, and large‐scale manufacturing ability [3–6] . Electrochemically stable SPEs for application to LMA and high‐nickel layered oxide cathode (e.g., LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811)) cells appear to be promising for increasing the specific energy of batteries to 450 Wh kg −1 and 1000 Wh L −1 [7,8] .…”

Section: Introductionmentioning

confidence: 99%

Anion‐modulated Ion Conductor with Chain Conformational Transformation for stabilizing Interfacial Phase of High‐Voltage Lithium Metal Batteries

Wang,

Zhao,

Li

et al. 2024

Angewandte Chemie

3

0

View full text Add to dashboard Cite

In solid‐state lithium metal batteries (SSLMBs), the inhomogeneous electrolyte‐electrode interphase layer aggravates the interfacial stability, leading to discontinuous interfacial ion/charge transport and continuous degradation of the electrolyte. Herein, we constructed an anion‐modulated ionic conductor (AMIC) that enables in‐situ construction of electrolyte/electrode interphases for high‐voltage SSLMBs by exploiting conformational transitions under multiple interactions between polymer and lithium salt anions. Anions modulate the decomposition behavior of supramolecular poly(vinylidene chloride) (PVC) at the electrode interface by changing the spatial conformation of the polymer chains, which further enhances ion transport and stabilizes the interfacial morphology. In addition, the AMIC weakens the “Li+‐solvation” and increases Li+ vehicle sites, thereby enhancing the lithium‐ion transport number (tLi+ = ~0.67). Consequently, Li||LiNi0.8Co0.1Mn0.1O2 cell maintains about 85% capacity retention and Coulombic efficiency > 99.8% in 200 cycles at a charge cut‐off voltage of 4.5V. This study provides a new understanding of lithium salt anions regulating polymer chain segment behavior in the SPE and highlights the importance of the ion environment in participating in the construction of interfacial phases and ionic conduction.

show abstract

“…The all‐solid‐state batteries (ASSBs) design strategy employing solid‐state electrolytes has the potential to materialize high‐safety and high‐specific energy electrical storage systems, mainly owing to its availability to apply lithium‐metal anode (LMA) (with theoretical capacities of about 3860 mAh g −1 and 2061 mAh cm −3 ) [1,2] . Solid‐state polymer electrolytes have garnered significant attention in the realm of SSLMBs due to their lightweight, low‐cost, bonding, flexibility, and large‐scale manufacturing ability [3–6] . Electrochemically stable SPEs for application to LMA and high‐nickel layered oxide cathode (e.g., LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811)) cells appear to be promising for increasing the specific energy of batteries to 450 Wh kg −1 and 1000 Wh L −1 [7,8] .…”

Section: Introductionmentioning

confidence: 99%

Anion‐modulated Ion Conductor with Chain Conformational Transformation for stabilizing Interfacial Phase of High‐Voltage Lithium Metal Batteries

Wang,

Zhao,

Li

et al. 2024

Angew Chem Int Ed

11

0

View full text Add to dashboard Cite

In solid‐state lithium metal batteries (SSLMBs), the inhomogeneous electrolyte‐electrode interphase layer aggravates the interfacial stability, leading to discontinuous interfacial ion/charge transport and continuous degradation of the electrolyte. Herein, we constructed an anion‐modulated ionic conductor (AMIC) that enables in‐situ construction of electrolyte/electrode interphases for high‐voltage SSLMBs by exploiting conformational transitions under multiple interactions between polymer and lithium salt anions. Anions modulate the decomposition behavior of supramolecular poly(vinylidene chloride) (PVC) at the electrode interface by changing the spatial conformation of the polymer chains, which further enhances ion transport and stabilizes the interfacial morphology. In addition, the AMIC weakens the “Li+‐solvation” and increases Li+ vehicle sites, thereby enhancing the lithium‐ion transport number (tLi+ = ~0.67). Consequently, Li||LiNi0.8Co0.1Mn0.1O2 cell maintains about 85% capacity retention and Coulombic efficiency > 99.8% in 200 cycles at a charge cut‐off voltage of 4.5V. This study provides a new understanding of lithium salt anions regulating polymer chain segment behavior in the SPE and highlights the importance of the ion environment in participating in the construction of interfacial phases and ionic conduction.

show abstract

Customized design of electrolytes for high-safety and high-energy-density lithium batteries

Cited by 15 publications

References 193 publications

Building Stable Solid‐State Potassium Metal Batteries

Building Stable Solid‐State Potassium Metal Batteries

Anion‐modulated Ion Conductor with Chain Conformational Transformation for stabilizing Interfacial Phase of High‐Voltage Lithium Metal Batteries

Anion‐modulated Ion Conductor with Chain Conformational Transformation for stabilizing Interfacial Phase of High‐Voltage Lithium Metal Batteries

Contact Info

Product

Resources

About