Lg Chem, Ltd

Korea Institute of Energy Research

Lg Energy Solution, Ltd.

Hyeon Jin Kim

Kyoung Wan Park

Changhun Park

Jung Joon Yoo

Young Su Park

Jeong Hun Baek

Ji Haeng Yu

Song Yi Yang

Seonghyo Park

Ju Han Yoon

Kyong Sik Yun

A method of preparing a bimodal positive electrode active material precursor and a positive electrode active material prepared from the same are disclosed herein. In some embodiments, the method includes inputting a first reaction source material including a first aqueous transition metal solution into a reactor, precipitating at pH 12 or more to induce nucleation of a first positive electrode active material precursor particle, and at less than pH 12 to induce growth of the same, inputting a second reaction source material including a second aqueous transition metal solution into the reactor containing the first positive electrode active material precursor particle, precipitating at pH 12 or more to induce the nucleation of a second positive electrode active material precursor particle, and at less than pH 12 to induce simultaneous growth of the first and second positive electrode active material precursor particles, thereby preparing a bimodal positive electrode active material precursor.

Positive electrode active material precursor and preparation method of positive electrode active material precursor

Disclosed herein is an electrochemical device forming a chip-capacitor or a super-capacitor. The electrochemical device includes: a ceramic substrate having a nonconductive ceramic layer, a current collecting layer disposed on a nonconductive ceramic layer and made of ceramic or cermet, and a metal layer arranged on outer surfaces of the nonconductive ceramic layer and the current collecting layer; an electrode having a positive electrode and a negative electrode and formed on the current collecting layer; and a nonconductive ceramic packaging module located on the ceramic substrate to accommodate electrolyte therein, wherein the metal layer is exposed to the outside of the nonconductive ceramic packaging module.

Method for manufacturing electrochemical device having exposed metal layer outside packaging

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Daejeon, South Korea

Hyeon Jin Kim