High‑Performance Thick Cathode Based on Polyhydroxyalkanoate Binder for Li Metal Batteries  

作　　者：Dong Hyuk Kang Minhyuck Park Jeonghun Lee Chan Yeol Kim Jimin Park Youn‑Ki Lee Jong Chan Hyun Son Ha Jin Hwan Kwak Juhee Yoon Hyemin Kim Hyun Soo Kim Do Hyun Kim Sangmin Kim Ji Yong Park Robin Jang Seung Jae Yang Hee‑Dae Lim Se Youn Cho Hyoung‑Joon Jin Seungjin Lee Yunil Hwang Young Soo Yun 

机构地区：[1]KU‑KIST Graduate School of Converging Science and Technology,Korea University,145 Anam‑ro,Seongbuk‑gu,Seoul 02841,South Korea [2]Carbon Composite Materials Research Center,Korea Institute of Science and Technology(KIST),92 Chundong‑ro,Bongdong‑eup,Wanju‑gun,Jeollabuk‑do 55324,South Korea [3]Energy Storage Research Center,Korea Institute of Science and Technology(KIST),5,14‑gil Hwaraong‑ro,Seoul 02792,South Korea [4]Program in Environmental and Polymer Engineering,Inha University,100 Inha‑ro Michuhol‑gu,Incheon 22212,South Korea [5]Advanced Analysis Data Center,Korea Institute of Science and Technology(KIST),5,14‑gil Hwaraong‑ro,Seoul 02792,South Korea [6]Advanced Nanohybrids Laboratory,Department of Chemistry and Chemical Engineering,Inha University,100 Inha‑ro,Michuhol‑gu,Incheon 22212,South Korea [7]CJ CheilJedang Corporation,55 Gwanggyo‑ro 42Beon‑gil,Yeongtong‑gu,Suwon 16495,South Korea [8]Department of Chemical Engineering,Hanyang University,222 Wangsimni‑ro,Seongdong‑gu,Seoul 04763,South Korea [9]Department of Integrative Energy Engineering,Korea University,145 Anam‑ro,Seongbuk‑gu,Seoul 02841,South Korea

出　　处：《Advanced Fiber Materials》2024年第1期214-228,共15页先进纤维材料（英文）

基　　金：supported by the Basic Science Research Program of the National Research Foundation of Korea(NRF)funded by the Ministry of Education(RS-2023-00302689 and NRF-2021R1A4A2001403);funded by the Korea Institute of Science and Technology(KIST)Institutional Program(2V09840).

摘　　要：Thick cathodes can overcome the low capacity issues,which mostly hamper the performance of the conventional active cathode materials,used in rechargeable Li batteries.However,the typical slurry-based method induces cracking and flaking during the fabrication of thick electrodes.In addition,a significant increase in the charge-transfer resistance and local cur-rent overload results in poor rate capabilities and cycling stabilities,thereby limiting electrode thickening.In this study,a synergistic dual-network combination strategy based on a conductive nanofibrillar network(CNN)and a nano-bridging amor-phous polyhydroxyalkanoate(aPHA)binder is used to demonstrate the feasibility of constructing a high-performance thick cathode.The CNN and aPHA dual network facilitates the fabrication of a thick cathode(≥250μm thickness and≥90 wt%active cathode material)by a mass-producible slurry method.The thick cathode exhibited a high rate capability and excel-lent cycling stability.In addition,the thick cathode and thin Li metal anode pair(Li//t-NCM)exhibited an optimal energy performance,affording high-performance Li metal batteries with a high areal energy of~25.3 mW h cm^(-2),a high volumetric power density of~1720 W L^(-1),and an outstanding specific energy of~470 W h kg^(-1)at only 6 mA h cm^(-2).

关 键 词：Thick cathode Polyhydroxyalkanoate binder Nano-bridging Conductive nano-fibrillar network Lithium metal battery 

分 类 号：TM912[电气工程—电力电子与电力传动]