Chapter 1. Introduction.- Chapter 2. Self-Suspended Suspensions of Covalently Grafted Hairy Nanoparticles.- Chapter 3. A Highly Conductive, Non-flammable Polymernanoparticle Hybrid Electrolyte.- Chapter 4. Hybrid Hairy Nanoparticle Electrolytes Stabilize Lithium Metal Batteries.- Chapter 5. A Highly Reversible Room Temperature Lithium Metal Battery Based on Cross-linked Hairy Nanoparticles.- Chapter 6. Confining Electrodeposition of Metals in Structured Electrolytes.- Chapter 7. Soft Colloidal Glasses as Solid-State.- Chapter 8. Solid Polymer Interphases for Lithium Metal Batteries.- Chapter 9. Stabilizing Polymer Electrolytes in High-Voltage Lithium Batteries.- Chapter 10. Lithium Fluoride Additives for Stable Cycling of Lithium Batteries at High Current Densities.- Chapter 11. Designing Solid-Liquid Interphases for Sodium Batteries.- Chapter 12. Electroless Formation of Hybrid Lithium Anodes for High Interfacial Ion Transport.- Chapter 13. Designer Interphases For the Lithium-Oxygen Electrochemical Cell.