Next Generation Solid-State Batteries

下一代固态电池

• 批准号: EP/P003532/1
• 负责人: Clare Grey
• 金额: $ 221.09万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP003532%2F1
• 关键词: Next; Generation; Solid; State; Batteries

Solid-state Li-ion batteries (SSLBs) represent the ultimate in battery safety, eliminating the flammable organic electrolyte. The SSLB would find potential uses in industries where battery safety is paramount, such as the automotive industry (in cars, e-bikes and buses) and also in smaller applications where the elimination of the liquid electrolyte results in more ready compatibility with other devices, e.g., a battery on a chip or sensor. These batteries can compete with traditional lithium ion batteries in terms of volumetric energy density but they suffer from low power density. Very recently several viable inorganic solid Li-ion conducting electrolytes been identified with conductivities approaching those of liquids, which motivates this research proposal. Strategies for lowering interfacial resistances, particularly between the electrolyte and electrodes, and for building inherently scaleable devices that can be cycled multiple times, without mechanical failure, are now urgently required to produce practical devices.This multi-institutional project brings together experienced, world-leading researchers from the University of Cambridge, the University of Oxford, and Imperial College with distinct but complementary expertise to attack a number of challenging critical issues in this field. Two classes of these solid electrolytes, oxide garnets and sulphide glass ceramics, have been found to have very high room-temperature ionic conductivities. A number of characteristics have been identified that may provide either relative benefits or disadvantages: higher-modulus materials may cycle more stably in batteries; tougher materials may be more easily brought into industrial practice; polycrystalline character may limit apparent bulk-transport rates, lowering power efficiency; interfaces may be chemically unstable, affecting long-term state of health; etc. We propose to implement fundamental studies that shed light on the relative benefits and disadvantages of the oxide and sulphide ion-conductor paradigms, using the Li6.55Ga0.15*0.3La3Zr2O12 (* = vacancy) (LLZO) garnet and the P2S5-Li2S (PSLS) glass ceramic as model materials.The project centres around three experimental work packages that focus on 1) quantifying bulk properties and making them reproducible; specifically, issues of moisture and carbon-dioxide sensitivity of the electrolytes will be addressed to produce films with reduced resistances at the interfaces between particles. LLZO and PSLS films will be contrasted, and transport through them will be investigated via a number of in operando (in situ) metrologies, e.g., 6Li tracer and NMR studies in close concert with theoretical studies of ionic transport. 2) illustrating chemistry of the solid-electrolyte/Li two-dimensional interface and probing its morphological stability over time; we seek to identify the critical parameters needed to mitigate Li-metal dendrite formation and growth, and which allow smooth Li-plating on the electrolyte surface. 3) producing tailored, cohesive three-dimensional interfaces with complex morphologies that do not crack on extensive cycling. The development of materials with much larger electrode/electrolyte contact areas will increase Li+ exchange between phases within the electrode, increasing rate performance. A multiscale modelling effort cuts across the 3 work packages, aiming to produce fundamental physical insight, synthesize experimental outputs, and guide experimental design. The goals for the theory portion are unique in the sense that the models will aim for true 'multiscale' character, integrating atomistic and continuum perspectives. Overall, the project aims to provide new new strategies to improve the performance of SSLBs but will also result in new electrolyte designs that are suitable for to protect Li metal in other so-called "beyond Li-ion" batteries such as Li-air and Li-S and smaller batteries for internet communications technologies.

固态锂离子电池 (SSLB) 代表了电池的终极安全性，消除了易燃有机电解质。 SSLB 将在电池安全至关重要的行业中找到潜在用途，例如汽车行业（汽车、电动自行车和公共汽车），以及小型应用，在这些应用中，消除液体电解质可以更容易地与其他设备兼容。例如，芯片或传感器上的电池。这些电池在体积能量密度方面可以与传统锂离子电池竞争，但它们的功率密度较低。最近，几种可行的无机固体锂离子导电电解质被发现其电导率接近液体，这激发了这项研究提案。现在迫切需要降低界面电阻（特别是电解质和电极之间的界面电阻）以及构建可多次循环且无机械故障的本质上可扩展的设备的策略来生产实用的设备。这个多机构项目汇集了经验丰富的世界各地的人员。来自剑桥大学、牛津大学和帝国理工学院的顶尖研究人员拥有独特但互补的专业知识，可以解决该领域的许多具有挑战性的关键问题。两类固体电解质，即氧化石榴石和硫化物玻璃陶瓷，已被发现具有非常高的室温离子电导率。已经确定了许多可能提供相对优点或缺点的特性：较高模量的材料可以在电池中更稳定地循环；更坚韧的材料可能更容易投入工业实践；多晶特性可能会限制表观散装传输速率，从而降低电力效率；界面可能化学不稳定，影响长期健康状况；我们建议使用 Li6.55Ga0.15*0.3La3Zr2O12 (* = 空位) (LLZO) 石榴石和 P2S5- 进行基础研究，阐明氧化物和硫化物离子导体范式的相对优点和缺点Li2S (PSLS) 玻璃陶瓷作为模型材料。该项目围绕三个实验工作包，重点关注 1) 量化整体特性并使其成为可能可重现；具体来说，将解决电解质的水分和二氧化碳敏感性问题，以生产颗粒间界面电阻降低的薄膜。将对比 LLZO 和 PSLS 薄膜，并通过许多现场（原位）计量技术研究通过它们的传输，例如与离子传输理论研究密切配合的 6Li 示踪剂和 NMR 研究。 2）说明固体电解质/锂二维界面的化学性质并探讨其随时间的形态稳定性；我们试图确定减轻锂金属枝晶形成和生长所需的关键参数，并允许在电解质表面平滑地镀锂。 3) 生成具有复杂形态的定制的、内聚的三维界面，并且在广泛的循环中不会破裂。开发具有更大电极/电解质接触面积的材料将增加电极内各相之间的 Li+ 交换，从而提高倍率性能。多尺度建模工作跨越 3 个工作包，旨在产生基本的物理洞察力、综合实验输出并指导实验设计。理论部分的目标是独特的，因为模型将瞄准真正的“多尺度”特征，整合原子论和连续体观点。总体而言，该项目旨在提供新的策略来提高 SSLB 的性能，同时也将产生新的电解质设计，适用于保护其他所谓的“超越锂离子”电池（例如锂空气电池和锂电池）中的锂金属。用于互联网通信技术的锂硫电池和小型电池。

项目成果

Analysis of H 2 O-induced surface degradation in SrCoO 3 -derivatives and its impact on redox kinetics

H 2 O 诱导的 SrCoO 3 衍生物表面降解及其对氧化还原动力学的影响分析

• DOI: http://dx.10.1039/d1ta04174f
• 发表时间: 2021
• 期刊: Journal of Materials Chemistry A
• 影响因子: 11.9
• 作者: Cavallaro A

Germanium as a donor dopant in garnet electrolytes

锗作为石榴石电解质中的供体掺杂剂

• DOI: http://dx.10.1016/j.ssi.2019.04.021
• 发表时间: 2019
• 期刊: Solid State Ionics
• 影响因子: 3.2
• 作者: Brugge R

SOLID-STATE NMR INVESTIGATION OF STRUCTURE AND DYNAMICS OF SOLID ELECTROLYTES AND COATINGS FOR LI-ION BATTERY APPLICATIONS

用于锂离子电池应用的固体电解质和涂层的结构和动力学的固态核磁共振研究

• DOI: http://dx.10.17863/cam.65611
• 发表时间: 2020
• 作者: Emge S

Structural Evolution of Layered Manganese Oxysulfides during Reversible Electrochemical Lithium Insertion and Copper Extrusion.

可逆电化学嵌锂和铜挤出过程中层状氧硫化锰的结构演化。

• DOI: http://dx.10.1021/acs.chemmater.1c00375
• 发表时间: 2021
• 期刊: a publication of the American Chemical Society
• 作者: Dey S

Structural Evolution of Layered Manganese Oxysulfides during Reversible Electrochemical Lithium Insertion and Copper Extrusion.

可逆电化学嵌锂和铜挤出过程中层状氧硫化锰的结构演化。

• DOI: http://dx.10.17863/cam.69587
• 发表时间: 2021
• 作者: Dey S