Work

Uniform carbon coating and solid electrolyte interphase synergistically enhanced exceptional anodic K‐ion storage properties of stable KTiOPO4 single crystals

Year: 2024

Type: article

Abstract: Searching for low‐cost, high‐capacity, high‐power, high‐stability, high‐tap‐density, and inherently safe materials for developing cheap, safe, and high‐performance batteries has always been a research hotspot. Herein, an inherently safe, low‐cost, and low‐strain KTiOPO4 (KTOP) submicron single crystals with a uniform thin layer carbon coating are developed using a ball‐mill assisted solid‐state method. Uniform solid electrolyte interphase, carbon coating, and inherently stable structure synergistically help compact KTOP submicron single crystals achieve an exceptional anodic K‐ion storage performance. The carbon‐coated KTOP single crystals obtained under the carbonization temperature of 400°C (KTOP‐C‐400) can deliver an exceptional potassium ion storage performance of 253.3, 224.0, 175.5, and 131.1 mA h g−1 at the current density of 100, 200, 500, and 1000 mA g−1, respectively, in the electrolyte of 5 M potassium bis(fluorosulfonyl)imide (KFSI) in DIGLYME electrolytes. Even after being cycled at 1000 mA g−1 for 1000 cycles, the capacity was maintained at 182.5 mA h g−1 with a coulombic efficiency of 99.9%.

Source: Carbon Neutralization

DOI: 10.1002/cnl2.167

Authors: Ling Bai, Su Jin, Qian Liu, Wenjuan Xu, Ziquan Li, Zhen‐Dong Huang

Institutions: Nanjing University of Posts and Telecommunications, The Synergetic Innovation Center for Advanced Materials

Language: English

Topic: Advancements in Battery Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

Funders: National Natural Science Foundation of China, Government of Jiangsu Province