Okay, I need to create a Wikipedia-style document about "Lithium Cobalt Oxide" under the categories of Technology > Energy > Battery. Let me start by understanding what exactly is required here.

First, the structure: H1 for the title, then an overview section, followed by detailed sections with H2 and H3 headings. Also, need to include references or related documents if necessary. The content should be accurate, objective, comprehensive, easy to read, and use technical terms with explanations. The markdown format needs proper hierarchy, lists, tables, emphasis, and code blocks where applicable. It has to be at least 800 characters long.

Starting with the title: "리튬 코발트 산화물" is straightforward. Now, the overview section should introduce what it is, its common use in batteries, maybe some basic properties. Then, I need to break down into sections like chemical structure, applications, advantages and disadvantages, synthesis methods, etc.

For each H2 section, I can have sub-sections (H3). For example, under "화학 구조", I can talk about the crystal structure, composition, maybe a table of properties. Under "응용 분야", discuss lithium-ion batteries, other uses like capacitors or sensors. Then in advantages and disadvantages, compare with other cathode materials.

I should check if there are any technical terms that need explanation. Terms like "layered structure" or "cathode material" might need brief explanations. Also, maybe include some data on energy density, voltage, cycle life from studies.

Need to make sure the information is accurate. For example, LiCoO2's typical applications in consumer electronics, its role as a cathode. Mentioning that it has high energy density but issues with thermal stability and cost could be important points.

Including synthesis methods like solid-state reaction or sol-gel process would add depth. Maybe a table comparing different synthesis techniques? Or at least describe them briefly.

References: I should mention some key studies or sources, maybe the original discovery by Goodenough or recent research papers. But since it's a wiki-style document, perhaps just citing general references like textbooks or reputable websites.

Also, need to ensure that the language is clear and not too technical without explanations. Avoid jargon unless necessary, and when used, explain them. For example, "cathode" can be explained as the positive electrode in a battery.

Check for length: 800 characters is about 150-200 words. But since it's a detailed document with multiple sections, I need to make sure each section has enough content. Maybe around 3-4 H2 sections with several H3s and some tables or lists.

Potential structure:

H1: 리튬 코발트 산화물

Overview: Definition, common use in batteries, key properties.

H2: 화학 구조 및 특성 - H3: 결정 구조 (layered) - H3: 화학식과 조성 - H3: 물리적/화학적 특성 (에너지 밀도, 전압 등)

H2: 응용 분야 - H3: 리튬 이온 배터리 - H3: 기타 응용 (전해 커패시터, 센서 등)

H2: 장단점 및 한계 - H3: 장점 (고 에너지 밀도) - H3: 단점 (열 안정성, 비용, 수명)

H2: 합성 방법 - H3: 고온 소결법 - H3: 용액 공정

H2: 관련 기술 및 연구 동향 - H3: 최근 연구 방향 - H3: 대체 물질 (예: NMC, LFP)

References and related documents.

Now, I need to flesh out each section with accurate information. For example, in the chemical structure, mention that it has a layered structure similar to α-NaFeO2, which allows lithium ions to move between layers. The composition is LiCoO2, with Co in +3 oxidation state. Physical properties like density, melting point, but maybe not too detailed unless necessary.

In applications, specify that it's used in smartphones, laptops, EVs (though maybe more common in consumer electronics than EVs now). Also mention its role in the cathode of Li-ion batteries.

For advantages: high energy density, good voltage, established technology. Disadvantages: thermal runaway risk, limited cycle life, cost due to cobalt scarcity.

Synthesis methods: solid-state reaction involves mixing lithium and cobalt oxides, heating at high temps. Sol-gel might be another method but less common.

Research trends could include surface modification to improve stability, or alternatives like NMC (nickel-manganese-cobalt) or LFP (lithium iron phosphate) which are more stable but have lower energy density.

Need to check for any inaccuracies. For example, is LiCoO2 still widely used in EVs? Maybe not as much now due to cost and safety concerns, so it's more common in consumer electronics. Also, mention that while it has high capacity, its thermal stability is a concern, leading to safety issues if overcharged or overheated.

Include some data points: energy density around 140-160 Wh/kg, voltage ~3.7V. Maybe compare with other cathode materials in a table.

Make sure the markdown is properly formatted with headers, lists, and any necessary tables. Avoid using code blocks unless there's specific technical content like chemical formulas or equations, but maybe just use it for the formula LiCoO2.

Also, ensure that each section flows logically and covers all key aspects without being too verbose. Keep paragraphs concise for readability.